Visit this video page on our website to see the full list of products used and other helpful tips: www.polyvance.com/video/polyurethane-repair/polyurethane-bumper-repair
I'm trying to restore a PolyUrethane bumper, glass fibre reinforced i think, PUR-GF- 20 it says on the bumper. The thing is i have no cracks to repair but there is two "flaps" on the backside that is meant to hold the bumper onto the car with screws. One has partly started to get loose and the other one is completely gone. I have started to learn basic plastic welding and thought that i could fix this by welding the loose one with some reinforcements and make new one for the one that are missing. But i got very disappointed when i understood welding in PolyUrethane does not work, at least not with my simple tools. Is there any glue or other chemical method that bonds well PU?
What vehicle did the bumper come from? Make sure you are reading the ID symbol on the bumper itself and not a component that is attached to the bumper. This is a common mistake. As far as repairing PUR, airless welding with the R01 rod as shown in this video is going to be the strongest repair.
Our airless welders are 200 watts. To repair polyurethane, you really need to be able to adjust the temperature. For this reason, we recommend our Mini-Weld Model 7 (www.polyvance.com/Airless-Welders-1/5700HT/) as opposed to our other airless plastic welders.
In 5:22 The spokesperson says to prepare the bumper for a sealer and a topcoat. Does that just mean a color basecoat and a clearcoat, or is there more to this I ain't hearing?
A sealer is like a primer, but has no build. You put on a sealer so your color coat has no weird color changes in caused by the repair materials under the paint, after its sprayed. You could also use a properly tinted and sanded high build primer-surfacer. The topcoat refers to the color and clear coats.
Try heat first. Get it hot by gently warning it with a heat gun (from one side only) and push the waves out by hand as much as possible. If that doesn't work then you can use the flex filler as long as you don't make it too deep. On corvettes, there is a lot of unsupported area on the bumper, so over time they tend to sag. I have also heard of others who reinforce the inside with a couple layers of fiberglass cloth to help keep the bumper from sagging further.
Yes, but not all that well. After a large urethane repair is done, its recommended you put a fiberglass patch on the backside to stiffen the area as the urethane repair is more flexible than the original material. Its not really carrying the load, it just keeps the area from flexing while installing the part on the car. Glass reinforcement is not needed on repairs like tabs, bolt holes, small tears, etc.
We stopped using this music shortly after this video was published. This video is almost 5 years old, and unfortunately, we can't do anything about the music. I'm sure you'd like our newer videos!
Visit this video page on our website to see the full list of products used and other helpful tips: www.polyvance.com/video/polyurethane-repair/polyurethane-bumper-repair
I'm trying to restore a PolyUrethane bumper, glass fibre reinforced i think, PUR-GF- 20 it says on the bumper. The thing is i have no cracks to repair but there is two "flaps" on the backside that is meant to hold the bumper onto the car with screws. One has partly started to get loose and the other one is completely gone. I have started to learn basic plastic welding and thought that i could fix this by welding the loose one with some reinforcements and make new one for the one that are missing. But i got very disappointed when i understood welding in PolyUrethane does not work, at least not with my simple tools. Is there any glue or other chemical method that bonds well PU?
What vehicle did the bumper come from?
Make sure you are reading the ID symbol on the bumper itself and not a component that is attached to the bumper. This is a common mistake.
As far as repairing PUR, airless welding with the R01 rod as shown in this video is going to be the strongest repair.
What wattage soldering iron would you recommend when using those rods to repair a bumper.
Our airless welders are 200 watts.
To repair polyurethane, you really need to be able to adjust the temperature. For this reason, we recommend our Mini-Weld Model 7 (www.polyvance.com/Airless-Welders-1/5700HT/) as opposed to our other airless plastic welders.
Where can I find your products?
I live in Athens Greece.
Hi! You can view this page to find a distributor near you: www.polyvance.com/International-Distributors/
In 5:22 The spokesperson says to prepare the bumper for a sealer and a topcoat. Does that just mean a color basecoat and a clearcoat, or is there more to this I ain't hearing?
Yes, the "topcoat" would be a basecoat and clearcoat. You would use a sealer or primer before the topcoat.
A sealer is like a primer, but has no build. You put on a sealer so your color coat has no weird color changes in caused by the repair materials under the paint, after its sprayed. You could also use a properly tinted and sanded high build primer-surfacer. The topcoat refers to the color and clear coats.
Thanks Kings!
Can I paint directly over the welding rod material, or do I need to bondo it to get proper adhesion?
Is this type of repair prone to rust
No. The bumper and welding rods are made of plastic.
😂😂😂
Ironically, I’m here to see how to repair an IROC bumper.
I have a front bumper of an '84 Corvette that looks pretty wavy. Should I use flex filler to make it look straight again?
Try heat first. Get it hot by gently warning it with a heat gun (from one side only) and push the waves out by hand as much as possible. If that doesn't work then you can use the flex filler as long as you don't make it too deep. On corvettes, there is a lot of unsupported area on the bumper, so over time they tend to sag. I have also heard of others who reinforce the inside with a couple layers of fiberglass cloth to help keep the bumper from sagging further.
@@scottb7600 That's a great idea. Thanks!
Paper mashing the inside will make it rigid
Will fiberglass stick to it
Yes, but not all that well. After a large urethane repair is done, its recommended you put a fiberglass patch on the backside to stiffen the area as the urethane repair is more flexible than the original material. Its not really carrying the load, it just keeps the area from flexing while installing the part on the car. Glass reinforcement is not needed on repairs like tabs, bolt holes, small tears, etc.
good
Lose the blo%#y music!!😖
We stopped using this music shortly after this video was published. This video is almost 5 years old, and unfortunately, we can't do anything about the music.
I'm sure you'd like our newer videos!