Casio F91W Hydro Mod - Filling My Watch With Tinted Oil
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- Опубліковано 10 лют 2025
- Giveaway!
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Filled my Casio F91W with oil to make it water proof. People call it hydro mod and in theory it works and there are people on the internet who proved it. bit.ly/2UmSt1I
I have no need for a watch that can survive on the bottom of the ocean... But if it can look cool... Then I want one.
It can look great. Mineral oil used to fill watches can be tinted in any color you can imagine. You need oil based dyes to do it, food coloring will not work. I chose blue to match the face and I cannot be happier with the result.
Thanks for watching
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MORE CASIO WATCHES!!!!!!!!!!!!!!!!!!
🤣🤣🤣🤣🤣
Definitely!
@@Techsas did you forget to press the light button or I missed it?
BTW very nice video!
And I absolutely like the result!
The shade of blue of the screen matches the face of the watch.
Though.... during a battery swap you will have to do everything all over again!
@@Wagner669 Thanks! The light is just as bad as it was so it didn't even come to mind to show it on video.
I wonder if there is fluorescent colouring, you'll never need the light again
damn brilliant idea
Sometimes my genius... it generates gravity
Yeah you can deffo get florescent inks, not sure if the medium it's suspended in matters beyond it not being water based
You can also add lume powder to the oil soultion. It wouldn't affect the coloring, but would cause it to glow in the dark like a Timex Indigo.
wow great thinking
"That's the exact opposite of how the water-proofing is supposed to work!" -Casio Engineer
"Yes" - Me
Watch is now waterproof to 1000m 👍
The background music is really disturbing and makes it hard to watch video.
I like to have the back cover submerged and pointing inside up before turning it over under the surface and screwing it on. Because it is embossed, it is really easy to trap air under it when lowering it under the oil.
Now give it to a watchmaker and ask for a batterry change :D
Para qué, si la batería dura más de 7 años y el reloj cuesta 15 usd
😀
If you can oil mod that watch then you can change the battery also, the problem is it will be messy.
Does the alarm still sound as loud (or work at all) when it's oil filled?
Fury and outrage as man puts watch in blue oil for no apparent reason.
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Bad news, mineral oil consume plastic.
U have to use silicone oil.
I love it, the color matches the face so well! Keep up the good work, I've been following you for a while!
Thanks! I think so too. Stay safe!
UV led replacement and fluorescent dye in the oil!
Love how you filmed this. Loved how the mineral water squirts and dye drops were to the beat. 😂 Maybe we're spectrum brothers because how is noone commenting on the pure gold of this edit
How does the screen look like when illuminated? I was looking forward to see it on the video
It doesn't look any different, the light is shit
What about modifying a watch with the el lighting, does it still work?
@@nicodemusbell1736 The only way I know how to put EL in F91W is to swap it with SKMEI module.
@@Techsas is it possible to change the light with something better?
unsolder the el-cheepo light casio uses in order to keep the price low and then, solder a better quality LED
@@Wagner669 Yes. Also the original LED is pointing up, you can solder to point to the LCD and that already is much better.
The way you inserted the backplate... I'd bet there's a bubble there
I like how video immediately shows second attempt 😂
Wow that's a radical mod lol. Looks cool!
wait, why isnt the oil leaking when you push one of buttons?
or do the buttons get greasy when pushed in several times?
It doesn't. I had this question as well, it's one of the reasons I did this mod.
@@Techsas damn thats so cool :)! for a next project you could use oil with some phosphorescence liquid or powder so the watch glows in the dark :D
I believe there are o-rings in the button assembly that prevents liquids from getting in (or out).
@@zerousen yeah, it's (on my casios) a double O-ring
@Lewis Friend if you push the buttons while under water, it WILL go inside the watch ;) this happend to me twice
Very cool! Looks awesome!
Thanks!
This looks amazing and I’m thinking of doing this my self. I wonder if glow powder could be added to the oil, that would be cool.
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Did it worked ?
Bumping
Mi pregunta es que clase de aceite es y si luego al presionar algun boton no se sale el aceite?
I wonder if this actually improves the waterproofing, since there's less pressure difference inside and outside the watch when diving
I believe so, Sinn did this with one of their quartz divers
In theory it can now go to ANY depth. No air inside to compress at a high depth means the case can't deform under high pressure.
@@spinnanz In theory? As long as the plastic casing doesn't break under pressure, it should remain water-proof?
@@retrohd1_ the case can't break under pressure as there is no air inside. Imagine is as if the case was full of sand.
@@spinnanz i imagine there are some capacitors and other electronic components that might break at enormously high pressures, but apart from that i agree with you 100 % :)
Why not just use a colour filter between the module and the case screen, they come in many colours and you can change it when ever you want.
Exaxtly
Wouldn't make it water proof
@@thomasmoran1211 it’s already waterproof from the factory
@@metaldog7128 it's not. It's water resistant. I killed mine surfing today. That's why I'm here. Someone has filled one with olive oil (similar to this) and kept at 900m below an oil prospecting rig for 3 days.
@@thomasmoran1211 I’ve never had any problems with mine, but I’ve never had it in the sea for longer a couple of seconds why doing stuff on the boat, but surfing it’s taking a beating for sure 👍 maybe go for a G Shock frogman .
does the light works ???
Nice video.. And that retrowave soundtrack is really legit👍👍
Yeah, I wouldn't use mineral oil however, mineral oil is slightly conductive, the battery will not last as long. This is best done with silicone oil.
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Couldn't the same effect have been achieved with a coloured film over the lcd?
Yes I've done some videos with the film
Coloured film is for kids. Coloured oil filled watch is for men
@@diomaiaal Until you need to change the battery.
@@lhl2500 first time giving your digital watch an oil change?
This also increases water resistance to crush depth
Dose a hydro mod make the battery die quicker? And can I go in the ocean and shower with it without breaking it
just done this yesterday with my f91w. crappy display doesnt help with viewing angles as much as it does with an analog watch but still, makes it more water and pressure resistant
Wait, it's not shorting the circuit? Cuz its oil and not water?
Yes, oil is not as conducive
Does the stopwatch go a bit slower because the viscosity of oil? Can we replace oil with water to avoid this consequence?
@Lewis Friend I swapped oil for ethanol, time goes faster now.
Aww man. i was hoping you would show how the backlight looks with the oil mod
i do with CASIO MDV-107 :)) only luminiscence is bad... watch is great i use blue oil is perfect piano black shine vs blue oooomg i love it :)
Really cool! Does the ink not make the oil slightly conductive though?
Techsas, how's the long run with the mineral oil?
Have no idea, I gave the watch away.
Probably as long as the watch would last other than changing the battery being a pain.
@@lifeisgood12341 imagine showing up in a watch seller and asking him to change the battery, I imagine he would be pissed xD
@@Marco-cl9pb He wouldn't care, I remember taking a casio for a battery change and I got it back with the sound not working.
@@Myaccisbanned was your Casio full with mineral oil?
In pretty sure the watch is only waterproof when not pushing the buttons . Every time you push them it opens and a tiny bit of oil will leak
Yes, and it is so
To reduce the leak, you need thick oil, narrow buttons.
Little oil flows out, the air bubble does not increase.
Nice build video. Great music! I'll play this on repeat today
Glad you like it!
oh wow, painting oil to make a filter - awesome idea~!!
Oh man now we al are going to try this lol
I highly encourage that
I heard that companies like ressence will add everything to the casing and then put the whole bath into a giant freezer so the oil is as dense as possible in the casing once it's sealed.
Won't oild damage rubber sealing?? looks cool though
mineral oil is harmless
@@unzulaessig thank you! .I saw silicone grease melting the rubber gascket. so i was wondering if oil does it too.
Long term effects are this will corrode and seep into the plastic
Very cool
yeah, mineral oil isn't great on plastics, see the mineral oil submerged PC trend fron like 2012-2016
I would love to see a follow-up on this watch though, if you still have it
Would silicon oil work better?
And how do you replace the battery if the power is week...
If we do that to a casio AQ-800 that is analog and digital at the same time will it still work?
No worries mate, for sure it will work. Only one thing that you need to consider, Casio AQ 800 is a solar powered watch. The oil will reduce the solar panel sensitivity of AQ-800.
Would your dye work with 100% Pure fluid Silicone Oil?
I'm not sure
Colored light filters or gels can be used much easier, i feel.
Hello !! Mineral oil filled watch ?? This watch still working ?? Pharmacy grade mineral oil??
Hi, yes. Still works I hope.
I guess once you have to change the battery, the process starts all over again?
Can this be done to Solar Casios?
Yeah but you only need to do that once every 7-10 years...
Hi Techsas, what is the purpose of constantly shaking the case with the tweezers @ 3:10 (around-about)? Is it just to get the LCD component into the case, or is the extra shaking also to get rid of bubbles? Thank you. Also did you have any tips to avoid bubbles in the front of the LCD? Thanks
Hey, the shaking is to avoid bubbles. If there was any bubbles under the module then shaking most likely helped to get them out. Other than that jus try and do everything slowly rather than dropping it in the oil and you should be good.
@@Techsas Thank you! :)
@@Techsas Thanks for your tips！
Hey that's awesome!.
Can we do this on a g5600 G-Shock model? (With solar feature) have you tried it?
ua-cam.com/video/ltW4RmbH_mE/v-deo.html G-Shock
Can you press the buttons of a hydro moded watch ?
What happens when you open it again for battery change? Will there be oil inside the watch?
Yes. Because I put oil inside the watch.
lmao
@@robertguy23 maybe he thought that the oil inside will vaporize overtime
I think a small piece of microfibre cloth in that bowl before placing the watch face down would have helped :)
I did that in a
a158 with yellow tint using manual transmission oil 75w something..
It looks like old lcd screen
I wanna do this with my watch (same one) and I've already got transfluid, got any pics of how it turned out?
@@dysastro5362
Send me a link please.
And give me time because im at work until 22:00
I want to do this, do I have to worry about the sealing rubber ring in the back absorbing the oil and getting thicker over time?
@Lewis Friend I already did it sue me
@Lewis Friend Keep an eye on your mom
Hi, it's nice mode. 👍
How much does it weigh now?
Thanks! 22g
Doesnt the oil damages the battery? Why are you filling it with oil?
Oil is non conductive. Increased water resistance.
@@Techsas thanks for the response
Looks a lot better.😳
Would this dye work with silicon oil?
What happens if you press a button? Oil alarm?
Just did some oil modding 2 days ago... didn't turn out so great, I really need to use a syringe or something to get more air out. I really wanted it to work on my white face timex Waterbury indiglo. I think it would look killer if I could pull it off.
As you can see its doable without a syringe, just need some patience. Squirting the oil out would just create more air bubbles.
@Joseph Does indiglo and date functions still work as should with oil inside the case?
@@NK-ng2vg It did, yes, but I was unable to test it long term. I had a friend that wanted to buy it, so I dried it out for him and he has it now. It still works.
Can I use cooking oil instead of mineral oil for this?
Probably. I don’t know how will that will affect your watch in the long run.
Lots of reasons not to. Cooking oils can be more reactive thus cause corrosion or they can be conductive mineral oil is particularly reactive with abs and pvc both of which this watch contains quite a bit of it will make it brittle and break down the plastics.
Not only that, but have you ever smelled cooking oil after it turns? I don't how to describe it, but it is one of the foul stenches around. I also don't know how long it takes, but it's definitely inside the two year mark.
Great mod! But I'm confused, these watches don't have button seals, so how does the oil not eventually leak out over time?
Haha I have no idea... It still doesn't leak
@@Techsas Well I suppose if the clearance between the buttons and the watch body is very small, say: 0.001" thousands of an inch, or smaller, then the surface tension of the mineral oil will be too thick to bridge the gap, and would remained encapsulated in the case. If my bullshit technical synopsis is correct, then you just made this watch highly water resistant.😉
@@brentneves3602 that's the idea! Check the link in the description, someone made a water pressure test on it.
I have done the same thing in my a158 with red mineral oil (car transmissions fluid)😝 5 years now no prodlem!
Rememder to put new batterie so you dont have to change oil too for the next 7 or more years
@@panosvrionis8548 You have to change your watch oil frequently. 😅🤣
What kind of dye are you using? Just food coloring?
I use dye for oil lamps. Most food coloring will not work, dye has to be oil soluble.
Baby oil would work?
It should work but I cannot guarantee if it's safe long term
With hydro mod does it ressit water better?
Yes. Someone did an experiment bit.ly/2UmSt1I Surviver at almost 1km depth for 3 days
@@Techsas awesome👍
So here is what they don't tell you about doing this. Firstly, you'll lose the beep..the alarm becomes barely audible after this. Second your buttons are gonna get mushy and sticky and sometimes even dribble a tiny amount of oil on your finger when you press the buttons (the oil on your fingers gets transferred to your clothes)
all this so you can go deep diving with your casio f91 that you will never do.
Wouldn’t the oil leak out when u press the buttons? Just a question, it’s been bothering me for a while...
I had this question as well but surprisingly it doesn't!
There's little rubber o-rings on each button. I think that's what is keeping the oil in
Se puede remplazar la batería no?
Yes. 10 years later you might as well change the oil.
Enjoy the battery change
Nice mod! Nice soundtrack! How the light works with oil?
Thanks! Light is as bad as it was.
@@Techsas Okay. Hope you will show us in your next oil-mod. Just for interest.
Can you do a mod of the w-59? It would be awesome!
Any ideas what can be changed?
@@Techsas I own personally one and its fantastic. You can make a tactical model. Putting a dark nato, paint the watch and also invert the color screen..
Now she float?
Yes!
Is the remaining oil reused or it is wasted..
Can be reused
@@Techsas thank you so much...
Looks nice bunjee .
Fantastic job!
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Does this mod increase the water resistance of the watch
In theory yes
Awesome... now its pizza time🍕🍕
haha thanks!
LORD CASIO MOD´S!!! SALUDOS, AMIGO.
Thanks!
dude can you custom oil on casio CA53, maybe that's can be great
ua-cam.com/video/ltW4RmbH_mE/v-deo.html G-Shock
is silicon oil save?
Yes. Probably even better
Grandioso experimento... Saludos desde la cuarentena en Perú
Thanks! Hello from quarantine in UK
How can I get started with watch modding ????
ua-cam.com/video/ltW4RmbH_mE/v-deo.html G-Shock....
I hope there is never a leak. Hope the seal works for many years. 😉
Well mineral oil will eat out the rubber gaskets in about a couple of months.
@@sterkriger2572 I thought mineral oil helps rubbers from drying out
@@waris3732 I think its more likely for the oils that are already in the gaskets are gonna get dissolved by the mineral oil, and then it'll start to slowly leak
Mineral oil does eat rubber generally, but how fast may depend on the compound. There may be some oil-resistant rubber compounds.
That looks great
I don't understand what happens if you put oil in it
Capisimo!!! Te pasaste! Great Job.
ua-cam.com/video/ltW4RmbH_mE/v-deo.html G-Shock
*WHAT HAPPEND WHEN UR WATCH TICKED TO THE 34 SECOND MARK...... LOOKS RUINED TO ME!!!!!!!......*
Something for the f-105??
have any ideas?
@@Techsas nothing, you are the genius
I wish he you did red to match the WR.
ua-cam.com/video/ltW4RmbH_mE/v-deo.html G-Shock
Complete noob here with maybe a stupid question, how come this doesn't damage the watch?
Oil is not conductive. Conductive but not as much.
The mineral oil can actually , over time, fray the rubber gaskets that seal the watch. There is special oil called silicon oil with 50% viscosity, called Fluorinert by brand name, which is certified to work with all electronics and used by corporations and the military for their advanced electrical products, from fighter planes to data servers. Also it is used for industrial applications like leak testing.
That's so cool! Doesn't the oil damage the internal components?
Nope. Mineral oil isn't corrosive to the traces or components.
Love this video
Wow ❤️❤️❤️
Why though?
Because I'm loco
Loco y aburrido 😂👍
Algo simple, pero lindo.
Thanks!
funny but but but casio which is the cheapest is actually a good watch with one exception, a watch in which the battery lasts for 10 years, which is almost impossible to kill, has a strap that is unlikely to survive more than 1 year. Yes, it just breaks where there is a hole. buying a new strap in new york together with the installation usually costs more than buying a new watch it turns out despite all the advertising and the fact that the watch has been working for 10 years, the real life is determined by the strap. it's time for casio to do something about it
@Lewis Friend you are 100% right, but i'm not talking about that
@Lewis Friend if you make a watch that can work freely for 15 years, which can be frozen or boiled, which a Russian tank can drive through and they will still work, then I think it would be realistic to make a strap that would also withstand all this
Great job! 👍
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benefit?
More water resistant
And now: Put it in the car a warm summerday!
How is this holding up 3 months later? I'm thinking of doing this with some fluoro resin dye mixed into the oil and a UV led replacement.
I don't know. I gave it away...