One of the main uses of paint like this is for guitar making (Luthiery) We use it to shield the inside of the control cavity. We then anchor a wire to the paint using a screw, and connect it to the ground wire. This helps to shield the signal from the pickups from interference and noise. resulting in less background hum and maintaining the integrity of the actual guitar signal. :)
This stuff is commonly used in the audio industry to paint the cavities in electric guitars or the inside of stage amps etc. The reason you ground it is to stop it becoming an anntenna and noise source in its own right.
Yeah it's a lot easier on an assembly line to just paint it quickly, but when people are doing custom jobs many just use copper foil tape because it's more effective. Would have liked to see a comparison here with a box covered in foil tape
Funny thing is, that might be due to the signal being too strong that close to the transmitter as the antenna gain can actually overload the reception.
I'm not too surprised this worked, people have been using paint like this in electric guitars for years because radio frequencies can be picked up through it's electronics and converted to sound
If you take the electrical cover panel off of any electric guitar, you'll see the inside painted black. That's this paint. It definitely works and has been a thing since before Linus was born.
I've seen a product like that (and even used it) in a electric guitar manufacturing, to coat the inside of electrical connections box to reduce humming caused by EMF. In my experience, thin copper foil on adhesive backing works much better, but unlike graphite smear, it will drive you insane trying to apply it to a complex internal geometry and look nice.
In 5G ( technicly since 2G) you have dynamic power managment to save battery life in cellphone. When you shielding it, it sees drop in quality and increases TX power (cell and phone). Next time you can check also what TX power is, because it could be 50 dBm paint loss without power increase.
Interesting to know! I have a bit of experience with RF from flying FPV drones and our video TXs (5.8ghz) also have variable power output depending on RSSI (depending on model) makes sense to me.
Which also makes blocking these signals for "health" reasons EXTRA super dumb, because you will actually cause your device to emit with higher power anyway XD
@@pure_leaf7331 Well yes, but only if the box whit normal paint has the same 5g stopping effect, hence a box whit normal paint would have been the correct option
Well but if both this and normal paint would have the same effectiveness, it could still be that the paint does nothing and its all the box itself@@Ration999
Looks like these tests were using n77 or n78 which is mid-band ~33GHz 5G. The paint is only rated up to 18GHz, so some tests with lower-band 4G or 5G could show even better results! Also, if you could show the power that the cellular radio is outputting too, that would be cool to see the reduction in decibels. Taking background for your office would also be interesting too, but you'd have to spend a lot of time to get the average readings, as transmitters will regularly change their output and direction of signals.
The product Linus was using (RF-IE50) looks similar to an old product we used to use to coat the outside back portion of CRT's (cathode ray tubes) The product we used was Aqudag. It was basically graphite suspended in a water type solution that was painted on the back of picture tubes for the negative side of the tube (and to make the tube and glass a large capacitor).
CRT tubes also have a lot of lead in them 2 do a similar thing. 'The So-Called (((Government)))' then robs millions of people with 'recycling fees' pretending 2 think it leeches into the water or whatever, even though dumps are barrier lined & the runoff treated, & the led never leaves the glass unless U melt it first =P
@@caodesignworks2407 oh sorry, I didn't understand that word was a device because "cathode ray tube" sounded like lab equipment to me. Should've googled it :) thanks.
The obvious thing to do with this paint is to dip someone's wifi antennas in it. Preferably the ones on their router. They're likely black already, so it probably won't be noticeable.The main challenge will be coming back later for more coats.
I've encountered a description of a similar paint years ago after wifi became a big thing and the recommended usage was businesses painting their interior walls with it so as to contain their wifi signals to their space and not into neighboring businesses space.
If that actually works, I can see it being helpful in appartments where there could be *many* wifi networks. The crosstalk might cause issues, especially on 2.4ghz. Just a guess
@@ktheveg To be honest most routers stick to a handful of channels. I have my wifi router on custom firmware and a wider bandwidth than allowed.. but I do not overlap any of my neighbors wifi network channels at all! Almost all of them are on 3 different channels and that includes 3 different ISP's outdoor wifi networks. I am amazed they do not all have terrible connection issues with the severe overlap they deal with!
This reminds me of the paint used on the ESD floors in Electronics Production Facilities. I'm not surprised that RF Paint actually works. There are plastics with metal embedded for shielding properties instead of full metal cans for shielding.
@@Helveteshit I'm aware of that, but only in the case of children chewing chips off corners. I just don't see it happening or it being an issue, other than the resale of home lol.
I know certain government buildings have RF shielding built into their walls and such. Something like this as an undercoat even if needing to be reapplied periodically is a *lot* cheaper than sewing copper and such throughout the walls.
Research TEMPEST, it's an RF emission security protocol. But it's not to block out 5G, it's to ensure that the potential RF generated INSIDE the building doesn't get out. In my experience, it uses a special dry wall with a lead shield, and the drywall is soldered together, but that was a while ago, so maybe it can be done with paint today.
Something similar is also used on the inside of TEMPEST-hardened equipment to keep stuff like video signals from being radiated where it could be picked up by an adversary.
Yeah, for meeting rooms this might be very handy to prevent easy eavesdropping. Not to mention army and so on. Sure, you might think the army wants the best of the best, but if you look at the war in Ukraine, they are already having supply issues for some stuff so its obvious that even a little blocking would already serve its purpose in some situations. I also didn't expect this to be so good and think its good to see it being tested. Even though the way to test could've been a little more professional
Guitar tech here, we use this stuff all the time to shield the electronics cavities. Foil tape is also used but can be a right pain in the arse if there's fiddly angles etc. An extra 25dB might not stop deathbeam mind control but that margin in signal to noise ratio is a god send!
The paint is really good for preventing annoying neighbours wifi networks interfering with your network and is good for preventing your network from leaking outside if you don’t want people to be able to crack its password or whatever. I also use this stuff for indoor/outdoor AP separation
@@th9667 you should see my neighbor, they've got their windows tinfoiled. Either they've got a meth lab, they're blocking EMF, or they're just blocking Florida's sunlight. Dunno
@@kavishbansalI don’t get good signal anyway where I live so I have a cell booster installed with indoor transmitters. But as some others have said the windows let all the rf in anyway
This kind of product is actually super common and I have personally used it for years inside of audio equipment. Most notably, guitars and guitar pedals. Something a stupid as getting a text message in your pocket will cause audio interference while playing a guitar unless it’s shielded. You can use copper, even HVAC tape. But this paint is the best
Oh god For years I had had a guitar that could detect phone calls. I was playing it and then suddenly it would start going "whenk whenk whenk whenk whenk!" and a cell phone would start ringing. Had figured out that it was somehow picking up the rensponse from a nearby phone, but only today I realized that I had a large antenna connected to a amplifier...
For the hat thing, copper/silver is a common alloy, when it is high enough silver its called sterling silver. Higher copper ratios are used for PCBs. It is in no way something that should be used for 5G blocking, but it is something that is commercially available that sounds fancy enough.
Yeah I upgraded my router since Verizon's router was four years old. It helped a bit but our house has got metal in places that makes the Wifi 5G signal drop 67% if you walk 20 feet in a certain direction.
@@raylopez99 that sucks. I have an AX6000 and I can still use my wifi half a block down the street. My house is a space station with all the tech so I tried to spring for something a little above entry level and it has made all the difference in the world. If you can justify spending a few bills on a proper router I would highly suggest it, especially if your house is like mine and you have 30 devices connected 24/7.
what frequency range are we talking? in my experience even MMW on Verizon can do penetration! Maybe its the network team in your market that just sucks.
For the cost of the paint and that it needs THREE coats to perform as promised, I’d think a wallpaper made of the right material (which is paintable) would do the same or better for less cost.
@@ts757arse If we're talking about espionage then this product is a no-go. The cost is prohibitive when compared to far more durable, substantial and well-tested methods. For the cost of this, and then the work, you could build a physical Faraday cage for far less money, in half the time, and it's far harder to physically breach.
I don't know about radio frequencies but we're currently building a house and the basement is going to be a man cave so they're using some weird overpriced plasterboard with apparently better soundproofing and fire resistance. Could any of y'all knowledgeable working gentlemen tell me if I'm getting ripped off or if that kind of stuff legitimately influences soundproofing especially? Thanks 🙏
@@charlesm.2604 I'd say it depends on your goals. Sounds do like to bounce around in corners, creating unwanted reverb. Something the baseboards may be a bit better at reducing than the wall they're attached to. If your goal is isolation however, and you don't want the rest of the house hearing the booming bass of your favourite movies, then the baseboards are going to do jack. The only solution to that is insulation. Carpeting the room kinda helps with both.
@@K-Anator So it'll make the audio in the basement better but won't keep it in the basement then. When it comes to insulation what would you recommend ? Some specific thick wallpaper ? Because I heard that foam didn't do jackshit either it was meant to capture the noise between the bumps and push it in another direction rather than killing it.
This paint is very common for musical instruments! I think it's in all my guitars from the factory. It definitely helps to keep it from buzzing loudly when plugged into an amplifier
You are ALMOST correct. The inside and outside Aquadag coatings on a CRT actually make a CAPACITOR for the high voltage. The outside coating IS the ground side. But it is not to dissipate static charges. 😉 👍
@@Runco990was just gonna chime in and say this! I would much prefer an aquadag than a metal cone CRT with high voltage potential on the exposed cone!
@@defconzero You and me both! I found out at 16 that a metal cone tube can shock the living hell out of you! I was playing around with an open Muntz chassis at the time.
@@Runco990 yeah I remember now.. DAG coating. It s been a loooong time since I worked on anything with a CRT in it. lol. I should know that for sure. I think the years are catching up with me. Always good to keep refreshing the knowledge. Cheers !
I used to work in a secure control room environment which was inside a Faraday cage. While this is an interesting product the cost of application is nowhere near as economical as existing methods of shielding. Even in a smaller application, such as a closet or even a lock box for securing devices, it's multiple times more expensive and potentially less durable than existing options. I can imagine it being good for tiny applications, like the inside of housing for electronics in industrial use, to prevent interference etc, but even then unless you're worried about weight you might as well go for a more durable and far cheaper option. If they could get the cost down to be comparable to existing methods it would be useful, but as it is I don't think it's likely to be widely adopted.
While the grounding might be complicated, I could see this being put to use in a practical manor in the spoofing scenario where you could paint the inside of a drawer in your home with this stuff and leave your keyfob in the drawer when you're at home. Use a kitchen drawer and I'd imagine you could probably even find a place to ground it as well if the wire is long enough.
I mean, I think the grounding is required more so because the electrical conductivity. If it's on a wall, where plug sockets are, and there's a fault that causes the live cable to come into contact with the paint layer, all your walls are now live at mains voltage. Whilst yes you would have an overcoat, there can be areas there's damage or you can have screws in the wall which makes those conductive. I'd imagine the regulations requiring it grounded are for this reason so having it in a drawer should be fine. Although there are certainly cheaper and easier solutions than using this paint if you just want a box that would block signals of devices where you could store your keys.
@@HoneySoakedSeagull If there was any leakage to the wall that is grounded (quite literally it is) the breaker will pop in any kind of sane electrical system. At home we tested it for fun one time and the breaker will pop even if a live wire touches concrete unpainted wall.
@@araarathisyomama787 I've also tripped the breaker touching neutral with my finger when changing a light fixture, where its literally only capactive leakage current flowing.
A metal box or aluminium foil would work fine as well to block the weak signal from this kind of remote. And if it isn't just next to your door it would be even harder to catch the signal from outside
Just an FYI, paint says up to 18Ghz, good 5G is mmw or 30-40Ghz. Proper way to test this is with a Signal Generator, Spectrum Analyzer, and two horn antenna's.
Yeah I was hoping to see an actual SE vs frequency graph to validate the manufacturer’s claims. A five sided metal box with the receiving horn inside and the 6th panel being a sample material illuminated by another horn would be a more scientific setup. Also it was mentioned later in the video, but grounding is really important for proper shielding otherwise the potential of your shield will foot up and down with the aggressor waves, 2.5 mohm from DUT to facility ground is standard in the industry.
As good as the Lab project is, I don't think its intention is to cientific test things that we *will not see any effect in real life examples*, you know this isn't a scientific channel, and I think that's beautiful
This reminds me of the University of Technology Sydney (UTS), whose main IT building is built like a faraday cage and so it's really hard to get a signal inside. The difference between these products and UTS's Building 11 though is that Building 11's signal-blocking nature was almost certainly an unintentional quirk of its architecture and extremely annoying 😂
I built a faraday cage for a science project before, an aluminum foil lined box with magnets to hold it closed... it worked for all sorts of things. My demo of it was a battery powered radio you could stick inside and as soon as you closed the box it went full static.
Aluminium foil wallpaper, my friend (: (..or if you have spare pencils (graphite ones) and bored kids... Have em color in the wall between you and your neighbor :))
@@kuro68000At least over here in the Netherlands the higher 5Ghz channels are technically prioritized for things like radar, so when people use them they might get kicked off of the channel every now and then. Perhaps a similar situation where you're at?
@@kuro68000 Depends what you mean by upper, Band C in many countries was licensed use only until a few years ago so most devices wont use it, so its empty. Though I see very little use of anything in the DFS range around here too, because many routers try to avoid it due to its drawbacks.
Wonder how useful/useless this would be in houses built next to each other/appartments against wifi interference. Whilst it might also block some cellular, you could leave at least one side "open" and that could be enough depending on where cell towers are nearby. In my case the "backyard" side would easily still allow cellular network connections in my home. And ofc the paint wouldn't block WiFi from within. This way the wifi's that interfere the most, from my direct nextdoor neighbors would at least be partially blocked, which could be rather useful.
@@alexturnbackthearmy1907 I use wired for literally everything but my phone and tablet... It's also those devices where a little better reception could really help me out so... EDIT: Realized my Switch is also Wi-Fi only because the only dongle I have doesn't work with it. And it's next to the WiFi AP so it just works, hence I forgot...
I worked with a welder in the early/mid 2010s that kept his MP3 player in a small cardboard box that an old shipment of bolts came in, because according to him he'd had 3 other MP3 players die due to noise coming from his welding setup until he started putting them in his "faraday box"
That quip about the windows - there exist windows that have a thin copper film on them (if you get to higher end of domestic thermal insulation), this also blocks 3G, 4G, and probably 5G. It is an issue in the building industry (a place near where I used to work found that out the hard way)
If there's a paint like this for the WiFi spectrum, this could be legitimately useful. Applying this on every single outer wall of the house with that RF-blocking fabric as part of your blinds can basically restrict your WiFi network to within your walls and prevent attacks from outside. You can also buy a repeater for your cellular network, which would mean that you can still get reception indoors without your WiFi leaking outdoors.
Huhhhhhhhhhhh thats actually a good Idea, well no wifi outside the house then but mmmmmhhhh. Could even be used to properly do wifi with multiple Aps just paint the rooms to cut off conflicting aps. Or just 1 AP per Room with blocking on all the walls, possibilities are endless.
@@danieljensen2626 That's a fair point, but I don't know if it would be enough to enable someone to attack your network from across the street. Regular doors screw with WiFi enough that actual blocking fabric would probably do well enough to prevent the vast majority of the signal from leaking.
@@CASyHD. I would extend an access point outside and put it on its own VLAN. That way you can have internet with your phone when needed without compromising the rest of your network.
You can also hear the effects of this type of paint. It has been used for years in the manufacture of electric guitars. Single coil pickups, like the ones in a player grade Stratocaster or a Silver Sky have their pick up cavities painted with this stuff like this, and these cavities are in turn grounded to the bridge. It can eliminate or reduce the amount of radio frequency interference and 60 cycle hum gathered by the single coil pickups and passed to the amplifier.
I like how the replies are criticizing making a classroom signal proof when the comment only meant putting a signal proof chamber inside a classroom. Reading comprehension guys, its a useful skill learn it. The actual problem is what school has tens of thousands of dollars to blow on a gimmick like this.
@@saladgreens912 how is reading comprehension the issue when you're literally adding imaginary words to the original statement. Nowhere does it say what you claim, you're just imagining they said that cuz to you that is more "logical."
ya don't need 5g blocking paint, just use whatever kind of windows are installed in my flat, combined with whatever the walls are made of and presto: you got yourself a house that protects against at least 99% of 5g! (99%, cause when i am outside (or just open the window) i get 100 mbit/s, while i get only 1 single mbit/s inside (and with my windows closed))
Indeed 5G is a regression in technology in a lot of ways. It may be faster if you're standing right next to the router, but who cares you're not standing right next to the router most of the time. At that point a 2.4 GHz connection is usually better. Sure it may not be as fast on paper but if you can still stream videos or whatever you are trying to do, then who cares what the stupid number associated with it is.
Check whether your window screens (for insects) are metallic. If so, switch them out for plastic screens (look identical, function identically, are cheaper) and it should help.
@@naomi-g Good point. Also some gypsum whiteboard (drywall) is reinforced with metal mesh and if your room uses this drywall effectively your room is a Faraday cage.
@@naomi-g as i mentioned before, opening the windows results in good mobile data, despite the window screens still being in the way. also, the windows in the bathroom, which do not have window screens, still block mobile data. thus unfortunately it is the windows themselves, which i am not about to change (if that is even allowed in this building)
Nice video, one thing to point out though is that the position of your body also influences your measurement. Especially for the paint test, you measured with your body between the direct line of sight with the transmitter, which one can expect to lower the signal strength
@@AlexDUDEMantale I believe he was more to the left side than right between the line of sight for the unpainted box. Results are likely not that much off, but it's sloppy methodology to say the least.
One of the things I noticed while Linus was playing with the box RF measurements they decreased significantly when Linus's body was directly in front of the box, he was blocking the line of site from the antenna from the transmitter.
I work in the broadcast industry and the 5G has been killing our satellite coms at C-band Definitely looks like something to discuss with the engineering team 😊
I am working for a company that does stuff with 5G, we build a Intel NUC that is able to act as a 5G network Acces Point and also you can record stuff with iPerf and replay it on the Access Point so you can basically simulate that your phone is currently driving on the highway. You can also just track the bandwith and latency with this thing in a Grafana dashboard. We use this Intel NUC to evaluate L4S in iPhones or to test cloud gaming with simulatet patterns so you can test cloud gaming services at home but the phone only gets so and so much bandwith (like the bandwith u get when you are on a train and stuff like that). Maybe you are interested in that stuff, it is open source and free to use.
@@Manhunternewthey aren't a standards qualification lab, they're doing fun experiments for a UA-cam audience. The difference in the results was drastic enough to draw a conclusion from and that's all, notice how they didn't attempt to quantify any of the results beyond "look number go smaller"? Certainly a lot of pseudo scientists here looking to have issue with anything he does now.
I for one would love to see Linus and team take on Alex Jones and disprove his conspiracies about tech. Maybe Linus could do a series on debunking tech conspiracies.
I used to manage a radio frequency project in Brasil and one of the suppliers was a canadian company (Safe Living's the name IIANM) that sells RF Blocking films to windows, doors (basic everything that needs to be translucent). That worked very well with UHF.
This could be a really good way to block RF from yout neighbors from interfering with your wifi. The drawbacks are obvious, you would be getting a much weaker mobile signal at home, and you wouldn't be able to use your wifi in the yard/garden (unless you had an extra access point on the outside) On the other hand, it would also prevent your RF from interfering with your neighbors' wifi signal. So on the whole, it could result in better wifi speed and lower ping for everyone.
I worked at a mental health clinic where a therapist believed that RF and EMF would make her sick, she had some snake oil "mete" and would flip out about the APs in the building. Eventually the clinic had to buy this exact product to paint her ENTIRE office. The fluorescent lights, microwaves, and the municipal wifi weren't an issue for her though. Just my APs.
Why not use a spectrum analyser with a special purpose measurement antenna. Mount the antenna in the box an use coax to go to the SA. That would be a proper test.
So it looks like the inside and outside of the box is coated in the RF paint. That is 6 layers total for the bottom, and sides. The top has 12 layers of paint. Might be cheaper to just put metal panels on your walls and paint them with regular paint.
Bought a Faraday box off Amazon to see if it would work to store car keys in and prevent from having our car stolen via intercepting key signal. Turns out it actually works, car wouldn't recognize the keys when they were in the box but standing next to the car, or even being in the car. So there is a cheap solution.
Note that the shielding effectiveness defined in the datasheet is depending on the measurement method the manufacturer has used. If you apply it in other circumstances, you probably get another shielding effectiveness. Also, when comparing your measurements with the datasheet you should not forget that when you measure shielding, you are always measuring the weakest link. In your measurement you are probably just measuring the seams between the top parts of your box. While the shielding defined in the datasheet should be the shielding purely of the material.
so, after all the linus acopyclypse and him saying he will run reliable;e scientific tests we have yet another seat of the pants fail? what did I even watch? It seemed to me the paint actually worked very well?
@@zeitgeist909 i did not state that the paint did not work well, or that the tests conducted are not realistic. I pointed out the differences between a measurement purely on the material and the application of that materiaal.
@@timclaeys2389 I am so sorry, I didn't mean to reply to your comment. It was supposed to be a direct comment to Linus. I actually think we agree it was a bad scientific test and so soon after Lunus promised to make sure his tests were rigorous we get something very much less than. Linus seemed to be saying the paint didn't work, but according to the test he did it seemed to work quite well. From what we saw. So apologies for attaching my comment to yours. Hopefully, LTT will address both of our concerns.
those are my favourite kinds of videos. where the crew is just having fun and cracking jokes but still caring about correctness. one thing it, i thought we were supposed to check 3 layers of paint but since they painted inside and outside of the box, that's more like 6
Ef shielding is pretty common in musical instruments in not sure how effective the paint would be for wifi or 5g but I can absolutely hear the difference between a guitar the does and doesn't have some kind of ef sheilding
the metal or here the carbon is working like a faraday cage , so you have to ground it , but you also could use it for transmittting electric if you´re out of cables 😀
Professional Shielded rooms include copper cladded walls, ceiling, floor, door. And copper screen coverings over air vents. And springy copper fingers around the door frame to make good conductivity around the gap between door and enclosure. And transformers on power to the enclosure room.
I think the grounding requirement is so that you don't accidentally electrocute yourself when a stray wire touches the wall, y'know, like how all devices with metal chassis should be grounded. Also helps remove any static buildup on the paint.
All in all, ionizing waves is what we should be worried. 5G is non ionizing and can go up to 300Ghz while the visible light we see starts at 430Thz. My air filter with a built in ionizer is more dangerous.
Yeah for the most part, I mean if you were one of these guys working on the towers though it's bad for you no doubt. So it is actually dangerous it's just the power level they are exposed to and the duration so for most applications it's pretty much a non-issue.
I disagree. I've seen studies that show that ionizing vs. non-ionizing is really just a red herring. Biologically, it still messes with you either way. 5G is overblown, because 4G and earlier was already an issue.
I've seen people use one of those blanket thing on their access point and complaining that they couldn't connect to the internet, not even kidding. You share the world with these people.
Cool video, but tbh I would be more interested in the EMF measuring device being in the box than a Smartphone to get numbers 😅 Are they maybe available somewhere?:)
The readings will probably go up if you measure the total fields in the box with the smartphone. Because of "bad reception" it will transmit at higher levels..
Haven gotten my amateur radio license, the one thing about thermal burns from consumer electronics (NOT radiation burns, they cannot burn you like the sun, different kind of burn) is they burn really deep. The first time I get an RF burn will be a bad day for sure.
I have seen a few cheap electric guitars being painted in the electronics compartment with that stuff, although more premium instruments use copper foil. due to the low signal strength that an electric guitar's pickup produces, RF shielding becomes extremely important, especially in a modern studio environment.
The key thing to remember here is that 5G radio waves are NON IONIZING Electromagnetic radiation. Radio waves are the lowest frequencies in the Electromagnetic Spectrum and thus Radio Waves are Electromagnetic Radiation at its weakest. If 5G radio waves were somehow harmful, then Visible Light should be 10^11x (100,000,000,000x) more dangerous and would be like insta death cancer rays (which they are not).
@@HOSPEHLOSHEPHWhether it's from an electronic device or a natural source is comoletely irrelevant. Photons are photons and energy is energy. The only factors that matter are wavelength and flux. Like the OP said, visible light, due to it's shorter wavelength, is incomparably more energetic per photon than radio waves are, so if visible light can't ionize anything in your body then radio waves or microwaves surely can't as well. As for flux, on a sunny day in tropical regions you can experience upwards of around 1000 W/m² from sunlight. Meanwhile EM flux from a cell network towers, even while standing just by them, is in the range of milliwatts per square meter, so around a million times weaker than direct sunlight
It's usually best to not have the device touch the RF-protection as it still leaks through a short distance (microwaves ovens are design so that you cannot put your body immediately against the protective gird for this reason). Don't know how this affect's the paint, but it's at least an issue for the fabric.
That B-roll... it was honestly one of the things that made me watch the channel after accidentally running into it a few years ago. Glad the funny b-roll is being sprinkled on again.
Would be interesting if the RF inside the box (ie your room) would be higher because the phone is trying really hard to connect to something with low reception.
My parents were ahead of the curve when it came to defending against unwanted radiation Asbestos insolation and lead paint Real character builder right there
I'm jealous, not only will your lungs never catch fire: the walls in your house must've been as delicious to lick! It's like living in Willy Wonka's factory! The snozzberries taste like snozzberries! ❤😂
here is the thing... (without going into the whole children eating paint flakes etc etc) the problem isn't with the current application BUT the problem is with the installation and removal/ demolition of it, if you currently have it installed then its far FAR superior to any material that could replace it... in the past (before we knew the risk) there was a very good reason why we was putting lead and asbestos in everything and that was it just works... so as long as you don't go ripping up the installation and licking your walls then you're perfectly fine...
A friend of mine built himself straw-bale house which construction technology includes strenghtening all the wall faces on both sides with fine chicken wire mesh before finishing with clay plaster - wire mesh does not create effective faraday cage, though weakens the signal a lot.
I'm honestly surprised and this was cool to watch! Now if you paint your house with it, you'd have to use WiFi calling. Maybe they need to use these on cars to keep people from texting/scrolling social media while driving :/
Tried. It was tried on cars. Now car have to intenionally bolster cell phone data or at minimum not interfear. Why? try calling emergency services for an accident in a car that blocks all cell phone data. That get reeeealy leathal reeeealy quick.
specifically the fact that a painted cardboard box worked this well might make this useful in any product testing where it is not expected that the customer has dozens of you device lying around active. So the are kinda just supposed to pair with the first appropriate device available. which might be quite the selection inside one of your buildings. Last time with such a test case I did make a tin foil tube. But giving a shoe box 3 layers of paint is easier then fully covering it in tinfoil. That stuff is pretty fragile in such a scenario. Also tinfoil is kinda suboptimal (and noisy), but it was only first conductive material realistically available for making a small enclosure. We did not exactly have a metal workshop there.
@@haxie4516 It's an amazing technology that's got quite a long background of research. Another example that more people would recognise would be noise dampening acoustic pyramid foams that are used to control background noise and echoes for studios (except they absorb and reflect audio waves rather than EMR) 😎
A great use for this would be to block outside/competitive networks. Say your office is in a building, and there are other buildings each with hundreds of businesses or residents all with their own access points that compete for bandwidth and make your wireless devices suck even when close to the APs..
I think the LTT company is going to be fine as long as they have someone as happy as Linus to segue to a sponsor. He's almost always on the verge of cracking up
The grounding wire deals with rooms. If you don’t paint the floor, you don’t have an enclosed room. The cardboard box was a complete enclosure…operating as a Faraday cage.
At 6:37 for about 1 frame you can actually see the 3rd point on the "5G Safety Guidelines". And it's about "5G WiFi". So not only do they have a separate page dedicated to 5G fearmongering, they also included a technology that has nothing to do with the 5G cell network, has been an established standard for more than a decade and mislabeled it (it's supposed to be "5GHz", not just "5G") to fit in. To me, that kind of sums up the technical knowledge of the average anti-5G-protester out there.
One of the main uses of paint like this is for guitar making (Luthiery)
We use it to shield the inside of the control cavity. We then anchor a wire to the paint using a screw, and connect it to the ground wire.
This helps to shield the signal from the pickups from interference and noise. resulting in less background hum and maintaining the integrity of the actual guitar signal.
:)
Luthier is such a cool word... and job.
Thanks for all you do! I love guitars 😁
That actually makes a lot of sense
I would assume that coaxial cables are probably a lot more useful in that?
@@artvandelay1720 Heck I use this exact brand in all of mine. 😆
Yep same for my guitars with this or copper foil. Super helpful with single coil guitars.
So, the main takeaways:
- Black cardboard blocks connection and lowers transfer speeds
- Regular cardboard increases connection transfer speeds
Science!
Linus is to short to jump to the ceiling... hide things above a fridge. ;)
@@jNetDowling Ork Science!
So, I must paint all my windows as well than walls?
Do you think black cars have the effect as well? Because whenever I’m connected to 5G in my car the service is god awful.
This stuff is commonly used in the audio industry to paint the cavities in electric guitars or the inside of stage amps etc. The reason you ground it is to stop it becoming an anntenna and noise source in its own right.
Thanks for the reminder that I have to painstakingly shield my guitar next time I change strings
@@JohnsonJohnsonJohnson-j6rI have to paint the whole body. I literally can hear the radio better than in my stereo 😂
Yeah it's a lot easier on an assembly line to just paint it quickly, but when people are doing custom jobs many just use copper foil tape because it's more effective. Would have liked to see a comparison here with a box covered in foil tape
I use copper tape but yeah - this might be more convenient.
Yep, was my first thought too.
5G enhancing cardboard, LET'S GO! Major breakthrough Linus!
wait until that channel makes a 2 hour video to debunk that claim
Cardboard antennas!
gonna leave in a cardboard house now, wish me luck
Funny thing is, that might be due to the signal being too strong that close to the transmitter as the antenna gain can actually overload the reception.
@@BeyondTheSidebecoming homeless is the safest way to go. Just quit your job and don't pay rent.
I'm not too surprised this worked, people have been using paint like this in electric guitars for years because radio frequencies can be picked up through it's electronics and converted to sound
If you take the electrical cover panel off of any electric guitar, you'll see the inside painted black. That's this paint. It definitely works and has been a thing since before Linus was born.
Damn I wanted to comment that first :
WTF dude. Thanks for the spoiler
Neat. Thank you for that.
@@ronny12tech Imagine reading the comments ABOUT A VIDEO *before* watching the video. You spoiled yourself.
I've seen a product like that (and even used it) in a electric guitar manufacturing, to coat the inside of electrical connections box to reduce humming caused by EMF. In my experience, thin copper foil on adhesive backing works much better, but unlike graphite smear, it will drive you insane trying to apply it to a complex internal geometry and look nice.
In 5G ( technicly since 2G) you have dynamic power managment to save battery life in cellphone. When you shielding it, it sees drop in quality and increases TX power (cell and phone). Next time you can check also what TX power is, because it could be 50 dBm paint loss without power increase.
Neat info, thanks for sharing!
That's what I was thinking
Interesting to know! I have a bit of experience with RF from flying FPV drones and our video TXs (5.8ghz) also have variable power output depending on RSSI (depending on model) makes sense to me.
Which also makes blocking these signals for "health" reasons EXTRA super dumb, because you will actually cause your device to emit with higher power anyway XD
I was going to say--thats basically true of all wireless protocols
I'm so glad you also tested an unpainted box alongside the painted one. Good call guys!
Not really, a fair control would be a box whit 3 coats of normal black paint. Now it is unknown if it is just painting black or special paint does it.
@@Ration999 but you’d still need a control box for that normal black box to make sure it wasn’t the paint?
@@pure_leaf7331 Well yes, but only if the box whit normal paint has the same 5g stopping effect, hence a box whit normal paint would have been the correct option
Well but if both this and normal paint would have the same effectiveness, it could still be that the paint does nothing and its all the box itself@@Ration999
@@Ration999 That now makes me wonder if the lead-based paints would be effective, they have been banned here (for consumers) for about 20 years.
Looks like these tests were using n77 or n78 which is mid-band ~33GHz 5G. The paint is only rated up to 18GHz, so some tests with lower-band 4G or 5G could show even better results! Also, if you could show the power that the cellular radio is outputting too, that would be cool to see the reduction in decibels. Taking background for your office would also be interesting too, but you'd have to spend a lot of time to get the average readings, as transmitters will regularly change their output and direction of signals.
N77/N78 are both sub 4ghz. Not sure where you pulled 33 from.
@@mustangthings wow yes I pulled it out my arse. It's ~3.3GHz DOH!
The product Linus was using (RF-IE50) looks similar to an old product we used to use to coat the outside back portion of CRT's (cathode ray tubes) The product we used was Aqudag. It was basically graphite suspended in a water type solution that was painted on the back of picture tubes for the negative side of the tube (and to make the tube and glass a large capacitor).
What work were u doing that this was a thing? :O
As he clearly stated he was building CRT monitors. @@aleks-33
CRT tubes also have a lot of lead in them 2 do a similar thing. 'The So-Called (((Government)))' then robs millions of people with 'recycling fees' pretending 2 think it leeches into the water or whatever, even though dumps are barrier lined & the runoff treated, & the led never leaves the glass unless U melt it first =P
@@aleks-33 He literally says it in the comment. He made CRTs. Like old TVs and Monitors
@@caodesignworks2407 oh sorry, I didn't understand that word was a device because "cathode ray tube" sounded like lab equipment to me. Should've googled it :) thanks.
The obvious thing to do with this paint is to dip someone's wifi antennas in it. Preferably the ones on their router. They're likely black already, so it probably won't be noticeable.The main challenge will be coming back later for more coats.
You can dip them again with the excuse "Yeah I'll check what is wrong with it, see if I can fix your internet"
That's an evil prank, I like your thinking!
Ya that’s what’s going to kill it and not it being dipped in liquid lmao. Just cut the power cord at that point.
@@saladgreens912 I didn't know plastic antenna shrouds are susceptible to water damage. Good to know.
@@0Rookie0 Ah no my bad I read “dip the entire router” in it.
I've encountered a description of a similar paint years ago after wifi became a big thing and the recommended usage was businesses painting their interior walls with it so as to contain their wifi signals to their space and not into neighboring businesses space.
If that actually works, I can see it being helpful in appartments where there could be *many* wifi networks. The crosstalk might cause issues, especially on 2.4ghz. Just a guess
@@ktheveg To be honest most routers stick to a handful of channels. I have my wifi router on custom firmware and a wider bandwidth than allowed.. but I do not overlap any of my neighbors wifi network channels at all! Almost all of them are on 3 different channels and that includes 3 different ISP's outdoor wifi networks. I am amazed they do not all have terrible connection issues with the severe overlap they deal with!
This reminds me of the paint used on the ESD floors in Electronics Production Facilities. I'm not surprised that RF Paint actually works. There are plastics with metal embedded for shielding properties instead of full metal cans for shielding.
What is it with lead paint, why aren't ppl using that?
@@knowwhatimeme Lead is kinda super toxic? Unless you work within radioactive stuff, where it is a must, ya ain't going to see it in the normal world.
@@knowwhatimemeisn’t that common sense why we don’t use lead paint anymore? It’s toxic bud causes brain damage
@@knowwhatimemeeverything constructed is eventually torn down. That turns the building materials into dust...
@@Helveteshit I'm aware of that, but only in the case of children chewing chips off corners. I just don't see it happening or it being an issue, other than the resale of home lol.
I know certain government buildings have RF shielding built into their walls and such. Something like this as an undercoat even if needing to be reapplied periodically is a *lot* cheaper than sewing copper and such throughout the walls.
Research TEMPEST, it's an RF emission security protocol. But it's not to block out 5G, it's to ensure that the potential RF generated INSIDE the building doesn't get out. In my experience, it uses a special dry wall with a lead shield, and the drywall is soldered together, but that was a while ago, so maybe it can be done with paint today.
You should see our radar scattering camo nets. Put it over our vehicles and instantly blocks our transceivers and gps signals lol. It's a bitch
Something similar is also used on the inside of TEMPEST-hardened equipment to keep stuff like video signals from being radiated where it could be picked up by an adversary.
Yeah so that people can't use 5G on their phones, being asses about workers using their phones.
Yeah, for meeting rooms this might be very handy to prevent easy eavesdropping. Not to mention army and so on. Sure, you might think the army wants the best of the best, but if you look at the war in Ukraine, they are already having supply issues for some stuff so its obvious that even a little blocking would already serve its purpose in some situations.
I also didn't expect this to be so good and think its good to see it being tested. Even though the way to test could've been a little more professional
Guitar tech here, we use this stuff all the time to shield the electronics cavities. Foil tape is also used but can be a right pain in the arse if there's fiddly angles etc. An extra 25dB might not stop deathbeam mind control but that margin in signal to noise ratio is a god send!
i can see people put this in their apartment and then complain about bad reception (if it works) which it probably doesn't
And then it weirdly did-
People are free to misuse real products that work, lmao
Like that wire mesh box Karens put on their routers to "protect" their children from WiFi signals.
When head ass comments before watching the video.
Also foil traps waves and make them bounce inside indefinitely until they find exit or cause short circuit 😂
The paint is really good for preventing annoying neighbours wifi networks interfering with your network and is good for preventing your network from leaking outside if you don’t want people to be able to crack its password or whatever. I also use this stuff for indoor/outdoor AP separation
But wouldn't it block your cellular signal too?
also quite flammable. Maybe coat it with intumescent graphite paint XD
Except, windows and doors literally let ur signal threw like u don't have that expensive paint at all?
@@th9667 you should see my neighbor, they've got their windows tinfoiled. Either they've got a meth lab, they're blocking EMF, or they're just blocking Florida's sunlight. Dunno
@@kavishbansalI don’t get good signal anyway where I live so I have a cell booster installed with indoor transmitters. But as some others have said the windows let all the rf in anyway
This kind of product is actually super common and I have personally used it for years inside of audio equipment. Most notably, guitars and guitar pedals. Something a stupid as getting a text message in your pocket will cause audio interference while playing a guitar unless it’s shielded. You can use copper, even HVAC tape. But this paint is the best
Oh god
For years I had had a guitar that could detect phone calls. I was playing it and then suddenly it would start going "whenk whenk whenk whenk whenk!" and a cell phone would start ringing. Had figured out that it was somehow picking up the rensponse from a nearby phone, but only today I realized that I had a large antenna connected to a amplifier...
For the hat thing, copper/silver is a common alloy, when it is high enough silver its called sterling silver.
Higher copper ratios are used for PCBs.
It is in no way something that should be used for 5G blocking, but it is something that is commercially available that sounds fancy enough.
I bet normal paint is enough to block Verizon's 5G.
Yeah I upgraded my router since Verizon's router was four years old. It helped a bit but our house has got metal in places that makes the Wifi 5G signal drop 67% if you walk 20 feet in a certain direction.
I used to work for Verizon. Can confirm lol
@@raylopez99 that sucks. I have an AX6000 and I can still use my wifi half a block down the street. My house is a space station with all the tech so I tried to spring for something a little above entry level and it has made all the difference in the world. If you can justify spending a few bills on a proper router I would highly suggest it, especially if your house is like mine and you have 30 devices connected 24/7.
Pretty sure just moving 5cm to the left has a chance of 98% to block Verizons 5g
what frequency range are we talking? in my experience even MMW on Verizon can do penetration! Maybe its the network team in your market that just sucks.
For the cost of the paint and that it needs THREE coats to perform as promised, I’d think a wallpaper made of the right material (which is paintable) would do the same or better for less cost.
@@ts757arse I'm not sure if I watch LTT for the videos, or comments like this. Thanks for the insights!
@@ts757arse If we're talking about espionage then this product is a no-go. The cost is prohibitive when compared to far more durable, substantial and well-tested methods. For the cost of this, and then the work, you could build a physical Faraday cage for far less money, in half the time, and it's far harder to physically breach.
I don't know about radio frequencies but we're currently building a house and the basement is going to be a man cave so they're using some weird overpriced plasterboard with apparently better soundproofing and fire resistance. Could any of y'all knowledgeable working gentlemen tell me if I'm getting ripped off or if that kind of stuff legitimately influences soundproofing especially? Thanks 🙏
@@charlesm.2604 I'd say it depends on your goals. Sounds do like to bounce around in corners, creating unwanted reverb. Something the baseboards may be a bit better at reducing than the wall they're attached to.
If your goal is isolation however, and you don't want the rest of the house hearing the booming bass of your favourite movies, then the baseboards are going to do jack.
The only solution to that is insulation.
Carpeting the room kinda helps with both.
@@K-Anator So it'll make the audio in the basement better but won't keep it in the basement then. When it comes to insulation what would you recommend ? Some specific thick wallpaper ? Because I heard that foam didn't do jackshit either it was meant to capture the noise between the bumps and push it in another direction rather than killing it.
This should be mandatory for every movie theater in the world.
Yea, it's even black so light bleed and cell signal taken care of in one swift stroke. Or rather 3 layers of strokes. You get the picture.
That would solve so much ...
For filming it wouldn't make a difference but for those people that don't leave their phone on silent would work wonders
please no movies are awful nowadays.
@@snintendog So you pay to go to movies that you don't like, just to go on your phone and annoy other people?
Actually impressed with how well the paint worked that's pretty cool
it's industry standard to block interference for a long time. For example, guitar electrics use these to kill noise from venues or radio wave.
imagine mixing it with lead ;)
Tin foil is way cheaper & works way better, & copper above that.
This paint is very common for musical instruments! I think it's in all my guitars from the factory. It definitely helps to keep it from buzzing loudly when plugged into an amplifier
That is used for painting on a CRT to act as a ground plane for HV. It will sink static charges from the CRT to ground.
You are ALMOST correct. The inside and outside Aquadag coatings on a CRT actually make a CAPACITOR for the high voltage. The outside coating IS the ground side. But it is not to dissipate static charges. 😉 👍
@@Runco990was just gonna chime in and say this! I would much prefer an aquadag than a metal cone CRT with high voltage potential on the exposed cone!
@@defconzero You and me both! I found out at 16 that a metal cone tube can shock the living hell out of you! I was playing around with an open Muntz chassis at the time.
@@Runco990 yeah I remember now.. DAG coating. It s been a loooong time since I worked on anything with a CRT in it. lol. I should know that for sure. I think the years are catching up with me. Always good to keep refreshing the knowledge. Cheers !
to be fair, @@Runco990 , they were close - its to hold the static charge rather than dissipate it, but it is the HV ground.
I used to work in a secure control room environment which was inside a Faraday cage. While this is an interesting product the cost of application is nowhere near as economical as existing methods of shielding. Even in a smaller application, such as a closet or even a lock box for securing devices, it's multiple times more expensive and potentially less durable than existing options. I can imagine it being good for tiny applications, like the inside of housing for electronics in industrial use, to prevent interference etc, but even then unless you're worried about weight you might as well go for a more durable and far cheaper option. If they could get the cost down to be comparable to existing methods it would be useful, but as it is I don't think it's likely to be widely adopted.
While the grounding might be complicated, I could see this being put to use in a practical manor in the spoofing scenario where you could paint the inside of a drawer in your home with this stuff and leave your keyfob in the drawer when you're at home. Use a kitchen drawer and I'd imagine you could probably even find a place to ground it as well if the wire is long enough.
I mean, I think the grounding is required more so because the electrical conductivity. If it's on a wall, where plug sockets are, and there's a fault that causes the live cable to come into contact with the paint layer, all your walls are now live at mains voltage. Whilst yes you would have an overcoat, there can be areas there's damage or you can have screws in the wall which makes those conductive. I'd imagine the regulations requiring it grounded are for this reason so having it in a drawer should be fine. Although there are certainly cheaper and easier solutions than using this paint if you just want a box that would block signals of devices where you could store your keys.
@@HoneySoakedSeagull If there was any leakage to the wall that is grounded (quite literally it is) the breaker will pop in any kind of sane electrical system. At home we tested it for fun one time and the breaker will pop even if a live wire touches concrete unpainted wall.
@@araarathisyomama787 I've also tripped the breaker touching neutral with my finger when changing a light fixture, where its literally only capactive leakage current flowing.
A metal box or aluminium foil would work fine as well to block the weak signal from this kind of remote. And if it isn't just next to your door it would be even harder to catch the signal from outside
Just an FYI, paint says up to 18Ghz, good 5G is mmw or 30-40Ghz. Proper way to test this is with a Signal Generator, Spectrum Analyzer, and two horn antenna's.
We're still waiting on our spectrum analyser, and a regular wall is enough to block mmWave 😅
So you are saying that the product still worked even when being used beyond its recommended sepc?
Yeah I was hoping to see an actual SE vs frequency graph to validate the manufacturer’s claims. A five sided metal box with the receiving horn inside and the 6th panel being a sample material illuminated by another horn would be a more scientific setup. Also it was mentioned later in the video, but grounding is really important for proper shielding otherwise the potential of your shield will foot up and down with the aggressor waves, 2.5 mohm from DUT to facility ground is standard in the industry.
Considering that mmWave gets completely attenuated by the thinnest piece of drywall, I think the paint would be a bit redundant.
As good as the Lab project is, I don't think its intention is to cientific test things that we *will not see any effect in real life examples*, you know this isn't a scientific channel, and I think that's beautiful
This reminds me of the University of Technology Sydney (UTS), whose main IT building is built like a faraday cage and so it's really hard to get a signal inside. The difference between these products and UTS's Building 11 though is that Building 11's signal-blocking nature was almost certainly an unintentional quirk of its architecture and extremely annoying 😂
12:30
"I'm pulling it out and oh yeah, she's struggling"
Please don't take this out of context
I built a faraday cage for a science project before, an aluminum foil lined box with magnets to hold it closed... it worked for all sorts of things. My demo of it was a battery powered radio you could stick inside and as soon as you closed the box it went full static.
chuck would love this
If you could block 2.4/5GHz WiFi that would be really useful when your neighbours have a rubbish ISP supplied router, turned up to 11.
Aluminium foil wallpaper, my friend (:
(..or if you have spare pencils (graphite ones) and bored kids... Have em color in the wall between you and your neighbor :))
...Reason to avoid WiFi channel 11. 😉
@@govcorpwatch around here every channel is a disaster on 2.4GHz, but for some reason the upper 5GHz channels are clear.
@@kuro68000At least over here in the Netherlands the higher 5Ghz channels are technically prioritized for things like radar, so when people use them they might get kicked off of the channel every now and then. Perhaps a similar situation where you're at?
@@kuro68000 Depends what you mean by upper, Band C in many countries was licensed use only until a few years ago so most devices wont use it, so its empty. Though I see very little use of anything in the DFS range around here too, because many routers try to avoid it due to its drawbacks.
Wonder how useful/useless this would be in houses built next to each other/appartments against wifi interference. Whilst it might also block some cellular, you could leave at least one side "open" and that could be enough depending on where cell towers are nearby. In my case the "backyard" side would easily still allow cellular network connections in my home. And ofc the paint wouldn't block WiFi from within. This way the wifi's that interfere the most, from my direct nextdoor neighbors would at least be partially blocked, which could be rather useful.
interesting thought, i would love to see tests on this!
Easier solution is already here. Paint everything, use ethernet and then wi-fi. Also gonna be faster any day of the week.
@@alexturnbackthearmy1907 I use wired for literally everything but my phone and tablet...
It's also those devices where a little better reception could really help me out so...
EDIT: Realized my Switch is also Wi-Fi only because the only dongle I have doesn't work with it. And it's next to the WiFi AP so it just works, hence I forgot...
Just paint your neighbor's wall!
@@JasperPeters Well if it only for inside use then wi-fi/ethernet combo should be fine.
I worked with a welder in the early/mid 2010s that kept his MP3 player in a small cardboard box that an old shipment of bolts came in, because according to him he'd had 3 other MP3 players die due to noise coming from his welding setup until he started putting them in his "faraday box"
That quip about the windows - there exist windows that have a thin copper film on them (if you get to higher end of domestic thermal insulation), this also blocks 3G, 4G, and probably 5G. It is an issue in the building industry (a place near where I used to work found that out the hard way)
If there's a paint like this for the WiFi spectrum, this could be legitimately useful. Applying this on every single outer wall of the house with that RF-blocking fabric as part of your blinds can basically restrict your WiFi network to within your walls and prevent attacks from outside. You can also buy a repeater for your cellular network, which would mean that you can still get reception indoors without your WiFi leaking outdoors.
The paint in this video would work fine for WiFi. Although you'd probably have quite a bit of leakage around your curtains.
Lead curtains lol
Huhhhhhhhhhhh thats actually a good Idea, well no wifi outside the house then but mmmmmhhhh. Could even be used to properly do wifi with multiple Aps just paint the rooms to cut off conflicting aps. Or just 1 AP per Room with blocking on all the walls, possibilities are endless.
@@danieljensen2626 That's a fair point, but I don't know if it would be enough to enable someone to attack your network from across the street. Regular doors screw with WiFi enough that actual blocking fabric would probably do well enough to prevent the vast majority of the signal from leaking.
@@CASyHD. I would extend an access point outside and put it on its own VLAN. That way you can have internet with your phone when needed without compromising the rest of your network.
You can also hear the effects of this type of paint. It has been used for years in the manufacture of electric guitars. Single coil pickups, like the ones in a player grade Stratocaster or a Silver Sky have their pick up cavities painted with this stuff like this, and these cavities are in turn grounded to the bridge. It can eliminate or reduce the amount of radio frequency interference and 60 cycle hum gathered by the single coil pickups and passed to the amplifier.
13:15 5G enhancing cardboard phone cover !!!INCOMING!!!
This seems useful for maybe like a classroom or a testing center where denying cellular signal may be important.
my classrom are already signalproof.
@@novelnouvelthere's always room to grow
@@novelnouvelwhy would u want a classroom to be signal proof? Seems foolhardy
I like how the replies are criticizing making a classroom signal proof when the comment only meant putting a signal proof chamber inside a classroom. Reading comprehension guys, its a useful skill learn it.
The actual problem is what school has tens of thousands of dollars to blow on a gimmick like this.
@@saladgreens912 how is reading comprehension the issue when you're literally adding imaginary words to the original statement. Nowhere does it say what you claim, you're just imagining they said that cuz to you that is more "logical."
The disappearing transmitter at 6:15 was so good. 😂 good job, editor!
ya don't need 5g blocking paint, just use whatever kind of windows are installed in my flat, combined with whatever the walls are made of and presto: you got yourself a house that protects against at least 99% of 5g! (99%, cause when i am outside (or just open the window) i get 100 mbit/s, while i get only 1 single mbit/s inside (and with my windows closed))
Indeed 5G is a regression in technology in a lot of ways. It may be faster if you're standing right next to the router, but who cares you're not standing right next to the router most of the time. At that point a 2.4 GHz connection is usually better. Sure it may not be as fast on paper but if you can still stream videos or whatever you are trying to do, then who cares what the stupid number associated with it is.
Radar scattering Camo meets we use in the military are pretty neat too. Blocks from 2ghz-95ghz
Check whether your window screens (for insects) are metallic. If so, switch them out for plastic screens (look identical, function identically, are cheaper) and it should help.
@@naomi-g Good point. Also some gypsum whiteboard (drywall) is reinforced with metal mesh and if your room uses this drywall effectively your room is a Faraday cage.
@@naomi-g
as i mentioned before, opening the windows results in good mobile data, despite the window screens still being in the way. also, the windows in the bathroom, which do not have window screens, still block mobile data. thus unfortunately it is the windows themselves, which i am not about to change (if that is even allowed in this building)
Nice video, one thing to point out though is that the position of your body also influences your measurement. Especially for the paint test, you measured with your body between the direct line of sight with the transmitter, which one can expect to lower the signal strength
I had the same thought. You can actually see the bandwidth drop a bit as Linus steps in between the box and transmitter.
also the position and angle of the phone matters aswell!
I saw the control unpainted box was just okay. Maybe there was a small effect on the painted one.
He tested the unpainted box the same way. I get what you're saying, but his point is still valid
@@AlexDUDEMantale I believe he was more to the left side than right between the line of sight for the unpainted box. Results are likely not that much off, but it's sloppy methodology to say the least.
5:51 That one random fly hitting linus!
One of the things I noticed while Linus was playing with the box RF measurements they decreased significantly when Linus's body was directly in front of the box, he was blocking the line of site from the antenna from the transmitter.
His body was also in the same position for the non-painted box, which maintained plenty of signal.
the 2nd part where he grounds the box you can see the box has direct line of sight to the modem
Yeah, this isn't the gotcha you were so desperately searching for
"What if game, but more good?" should be AMD's real slogan
I work in the broadcast industry and the 5G has been killing our satellite coms at C-band
Definitely looks like something to discuss with the engineering team 😊
My wife has a similar-looking device, I didn't know she was so much into tech.
Hers is a MUF reader.
Contrary to what you might think, they're actually NOT supposed to vibrate
@@Zatchillac the 5g signals in his house is really high. The sensor keeps going off
Stop saying leftist nonsense that 5G causes cancer
@@MrLlama999😅😅😅😂😂😂
seems like that paint would be good for making that room even more isolated from outside noise though, I think that is a good application for it
security too. 5G and IOT will be self meshing. Not as easy to secure, especially given vulnerabilities in many devices.
I am working for a company that does stuff with 5G, we build a Intel NUC that is able to act as a 5G network Acces Point and also you can record stuff with iPerf and replay it on the Access Point so you can basically simulate that your phone is currently driving on the highway.
You can also just track the bandwith and latency with this thing in a Grafana dashboard.
We use this Intel NUC to evaluate L4S in iPhones or to test cloud gaming with simulatet patterns so you can test cloud gaming services at home but the phone only gets so and so much bandwith (like the bandwith u get when you are on a train and stuff like that).
Maybe you are interested in that stuff, it is open source and free to use.
That's really cool!
What's that open source project called?
You also need to paint the box with normal paint, as a control. The density needs to match that of the 5g paint box.
They have a sick lab but the methods are not very scientific
@@Manhunternew The public quality control also failed
@@Manhunternewthey aren't a standards qualification lab, they're doing fun experiments for a UA-cam audience. The difference in the results was drastic enough to draw a conclusion from and that's all, notice how they didn't attempt to quantify any of the results beyond "look number go smaller"?
Certainly a lot of pseudo scientists here looking to have issue with anything he does now.
I for one would love to see Linus and team take on Alex Jones and disprove his conspiracies about tech. Maybe Linus could do a series on debunking tech conspiracies.
I used to manage a radio frequency project in Brasil and one of the suppliers was a canadian company (Safe Living's the name IIANM) that sells RF Blocking films to windows, doors (basic everything that needs to be translucent). That worked very well with UHF.
Would love to see you guys try and make your own for cheaper from graphite powder!! Love the channel
This could be a really good way to block RF from yout neighbors from interfering with your wifi. The drawbacks are obvious, you would be getting a much weaker mobile signal at home, and you wouldn't be able to use your wifi in the yard/garden (unless you had an extra access point on the outside)
On the other hand, it would also prevent your RF from interfering with your neighbors' wifi signal.
So on the whole, it could result in better wifi speed and lower ping for everyone.
The graphite paint is basically Aquadag, it has been used for around 100 years for RF screening and also as the conductive coating on CRT bowls.
I worked at a mental health clinic where a therapist believed that RF and EMF would make her sick, she had some snake oil "mete" and would flip out about the APs in the building. Eventually the clinic had to buy this exact product to paint her ENTIRE office. The fluorescent lights, microwaves, and the municipal wifi weren't an issue for her though. Just my APs.
She should've been seeing a therapist herself
That person should not be classified as a medical professional.
I made that argument multiple times@@DylanClarkSallee but insurance farms gonna farm.
Dan in comedy gold no matter how little he is in a video XD
After watching this video we've completely covered our office in cardboard and we're experience unbelieve speeds. Thank you Linus.
Why not use a spectrum analyser with a special purpose measurement antenna. Mount the antenna in the box an use coax to go to the SA. That would be a proper test.
So it looks like the inside and outside of the box is coated in the RF paint. That is 6 layers total for the bottom, and sides. The top has 12 layers of paint. Might be cheaper to just put metal panels on your walls and paint them with regular paint.
Bought a Faraday box off Amazon to see if it would work to store car keys in and prevent from having our car stolen via intercepting key signal.
Turns out it actually works, car wouldn't recognize the keys when they were in the box but standing next to the car, or even being in the car.
So there is a cheap solution.
Note that the shielding effectiveness defined in the datasheet is depending on the measurement method the manufacturer has used. If you apply it in other circumstances, you probably get another shielding effectiveness. Also, when comparing your measurements with the datasheet you should not forget that when you measure shielding, you are always measuring the weakest link. In your measurement you are probably just measuring the seams between the top parts of your box. While the shielding defined in the datasheet should be the shielding purely of the material.
so, after all the linus acopyclypse and him saying he will run reliable;e scientific tests we have yet another seat of the pants fail? what did I even watch? It seemed to me the paint actually worked very well?
@@zeitgeist909 i did not state that the paint did not work well, or that the tests conducted are not realistic. I pointed out the differences between a measurement purely on the material and the application of that materiaal.
@@timclaeys2389 I am so sorry, I didn't mean to reply to your comment. It was supposed to be a direct comment to Linus. I actually think we agree it was a bad scientific test and so soon after Lunus promised to make sure his tests were rigorous we get something very much less than. Linus seemed to be saying the paint didn't work, but according to the test he did it seemed to work quite well. From what we saw. So apologies for attaching my comment to yours. Hopefully, LTT will address both of our concerns.
those are my favourite kinds of videos. where the crew is just having fun and cracking jokes but still caring about correctness. one thing it, i thought we were supposed to check 3 layers of paint but since they painted inside and outside of the box, that's more like 6
Ef shielding is pretty common in musical instruments in not sure how effective the paint would be for wifi or 5g but I can absolutely hear the difference between a guitar the does and doesn't have some kind of ef sheilding
the metal or here the carbon is working like a faraday cage , so you have to ground it , but you also could use it for transmittting electric if you´re out of cables 😀
13:58 Joke's on you, I get my news from memes.
Professional Shielded rooms include copper cladded walls, ceiling, floor, door. And copper screen coverings over air vents. And springy copper fingers around the door frame to make good conductivity around the gap between door and enclosure. And transformers on power to the enclosure room.
I think the grounding requirement is so that you don't accidentally electrocute yourself when a stray wire touches the wall, y'know, like how all devices with metal chassis should be grounded. Also helps remove any static buildup on the paint.
All in all, ionizing waves is what we should be worried. 5G is non ionizing and can go up to 300Ghz while the visible light we see starts at 430Thz.
My air filter with a built in ionizer is more dangerous.
Yeah for the most part, I mean if you were one of these guys working on the towers though it's bad for you no doubt. So it is actually dangerous it's just the power level they are exposed to and the duration so for most applications it's pretty much a non-issue.
Non-ionizing waves can cause harm too but thanks for the info anyway.
I disagree. I've seen studies that show that ionizing vs. non-ionizing is really just a red herring. Biologically, it still messes with you either way. 5G is overblown, because 4G and earlier was already an issue.
I've seen people use one of those blanket thing on their access point and complaining that they couldn't connect to the internet, not even kidding. You share the world with these people.
Cool video, but tbh I would be more interested in the EMF measuring device being in the box than a Smartphone to get numbers 😅 Are they maybe available somewhere?:)
The readings will probably go up if you measure the total fields in the box with the smartphone. Because of "bad reception" it will transmit at higher levels..
@@marcelleuenberger4648 probably :) but I meant just the device, without the Smartphone, how low does it go compared to same position without box.
...and people think they're interacting with ghosts every time they get an EMF fluctuation in TV shows and call it "evidence" of the paranormal rofl 🤣
LOL and those same people think they're "experts" on things that they can't explain 🤣
Haven gotten my amateur radio license, the one thing about thermal burns from consumer electronics (NOT radiation burns, they cannot burn you like the sun, different kind of burn) is they burn really deep.
The first time I get an RF burn will be a bad day for sure.
I have seen a few cheap electric guitars being painted in the electronics compartment with that stuff, although more premium instruments use copper foil. due to the low signal strength that an electric guitar's pickup produces, RF shielding becomes extremely important, especially in a modern studio environment.
many of the high end guitars also use the paint.
The key thing to remember here is that 5G radio waves are NON IONIZING Electromagnetic radiation. Radio waves are the lowest frequencies in the Electromagnetic Spectrum and thus Radio Waves are Electromagnetic Radiation at its weakest. If 5G radio waves were somehow harmful, then Visible Light should be 10^11x (100,000,000,000x) more dangerous and would be like insta death cancer rays (which they are not).
Sunlight isn’t plugged into a power outlet and the sun is like 7 million miles away. Your comparing apples to oranges.
@@HOSPEHLOSHEPHWhether it's from an electronic device or a natural source is comoletely irrelevant. Photons are photons and energy is energy. The only factors that matter are wavelength and flux. Like the OP said, visible light, due to it's shorter wavelength, is incomparably more energetic per photon than radio waves are, so if visible light can't ionize anything in your body then radio waves or microwaves surely can't as well. As for flux, on a sunny day in tropical regions you can experience upwards of around 1000 W/m² from sunlight. Meanwhile EM flux from a cell network towers, even while standing just by them, is in the range of milliwatts per square meter, so around a million times weaker than direct sunlight
It's usually best to not have the device touch the RF-protection as it still leaks through a short distance (microwaves ovens are design so that you cannot put your body immediately against the protective gird for this reason).
Don't know how this affect's the paint, but it's at least an issue for the fabric.
This was a fun video! So nice to see LTT getting back to their best form.
11:34 Schrodinger‘s phone
That B-roll... it was honestly one of the things that made me watch the channel after accidentally running into it a few years ago.
Glad the funny b-roll is being sprinkled on again.
fun fact to all 5g haters: if you think 5g is dangerous you should probably move to a planet with no sun whatsoever
Non-native emfs are completely different. Looking into the work of Dr Kruse & Dr Pollock
Typical sheople talk
You’re so lost
Typical sheep talk. Read invincible rainbow
Would be interesting if the RF inside the box (ie your room) would be higher because the phone is trying really hard to connect to something with low reception.
My parents were ahead of the curve when it came to defending against unwanted radiation
Asbestos insolation and lead paint
Real character builder right there
ahh, both lung cancer and delerium
Also defending against health
I'm jealous, not only will your lungs never catch fire: the walls in your house must've been as delicious to lick! It's like living in Willy Wonka's factory! The snozzberries taste like snozzberries! ❤😂
here is the thing... (without going into the whole children eating paint flakes etc etc) the problem isn't with the current application BUT the problem is with the installation and removal/ demolition of it, if you currently have it installed then its far FAR superior to any material that could replace it... in the past (before we knew the risk) there was a very good reason why we was putting lead and asbestos in everything and that was it just works... so as long as you don't go ripping up the installation and licking your walls then you're perfectly fine...
@@Secret_Takodachi i kinda miss that sweet sweet smell of tetra-ethyl lead at the gas station
A friend of mine built himself straw-bale house which construction technology includes strenghtening all the wall faces on both sides with fine chicken wire mesh before finishing with clay plaster - wire mesh does not create effective faraday cage, though weakens the signal a lot.
2:00 Was I the only one who really wanted to see "Drop Everything" Linus?
I'm honestly surprised and this was cool to watch!
Now if you paint your house with it, you'd have to use WiFi calling.
Maybe they need to use these on cars to keep people from texting/scrolling social media while driving :/
Tried. It was tried on cars.
Now car have to intenionally bolster cell phone data or at minimum not interfear.
Why?
try calling emergency services for an accident in a car that blocks all cell phone data. That get reeeealy leathal reeeealy quick.
specifically the fact that a painted cardboard box worked this well might make this useful in any product testing where it is not expected that the customer has dozens of you device lying around active. So the are kinda just supposed to pair with the first appropriate device available. which might be quite the selection inside one of your buildings. Last time with such a test case I did make a tin foil tube. But giving a shoe box 3 layers of paint is easier then fully covering it in tinfoil. That stuff is pretty fragile in such a scenario. Also tinfoil is kinda suboptimal (and noisy), but it was only first conductive material realistically available for making a small enclosure. We did not exactly have a metal workshop there.
8:31 but what if I want to protect the insides of my stomach from the harmful 5G rays?
3:50 sad dan :(
Chuck from Better Call Saul would be amazed, especially with the fabric.
I like the direction LTT is going. This is great! Involve the team, keep in informative, yet simple. 7/10 Linus's
ok now i need to see a microwave or a straight up steel box for comparison
I wrote my thesis on EMR absorbers/reflectors. Really interesting stuff. A big application is stealth coatings for aircraft.
Daaang. I hadn't even considered that, but that totally makes sense
@@haxie4516 It's an amazing technology that's got quite a long background of research.
Another example that more people would recognise would be noise dampening acoustic pyramid foams that are used to control background noise and echoes for studios (except they absorb and reflect audio waves rather than EMR) 😎
@@charvos1
Yeah, I knew of those, I'd just never considered stealth planes.
It's kinda mind-blowing tbh, super cool!
The editing in this video is so extra, really good work
Why is Adam wearing office buildings on his ears?
This is what I am trying to figure out.
3:05
A great use for this would be to block outside/competitive networks. Say your office is in a building, and there are other buildings each with hundreds of businesses or residents all with their own access points that compete for bandwidth and make your wireless devices suck even when close to the APs..
I think the LTT company is going to be fine as long as they have someone as happy as Linus to segue to a sponsor. He's almost always on the verge of cracking up
5g blocking paint has been around for ages. It's called lead paint ;)
Don't get China excited
Id rather not live anywhere with lead paint lol
The Romans used lead pipes for drinking water. No wonder they died by mysterious poisoning.
@@dominicwehrmann8515Hey man, it's either 5G that kills you or lead paint. Pick your poison.
Does lead paint block RF?
The grounding wire deals with rooms. If you don’t paint the floor, you don’t have an enclosed room. The cardboard box was a complete enclosure…operating as a Faraday cage.
At 6:37 for about 1 frame you can actually see the 3rd point on the "5G Safety Guidelines". And it's about "5G WiFi". So not only do they have a separate page dedicated to 5G fearmongering, they also included a technology that has nothing to do with the 5G cell network, has been an established standard for more than a decade and mislabeled it (it's supposed to be "5GHz", not just "5G") to fit in. To me, that kind of sums up the technical knowledge of the average anti-5G-protester out there.
If UA-cam allowed me to add GIFs to messages, I'd put the red string on a corkboard clip from it's always sunny here, because that lot are cuckoo