Monday, 08 February 2010 15:11

How to Fix a Bumper Hole

This video show how to fix a small hole in this 300 bumper using epoxy repair adhesive. The most important things to remember for this repair is plastic cleaning methods and the use of an adhesion promoter here is important. This repair method works with any thermoset plastic, however the adhesion promoter isn't always necessary. If you take a grinding disc to the back and the plastic smears, use and adhesion promoter. If the plastic powders skip that step. There are other good repair alternatives such as plastic welding, when either repair is done correctly it should be stronger then the original.
 

You will also see the mesh being utilized to help re-enforce the epoxy on the rear. There are also some innovative alternatives such as the stick on patch by 3M. You simple peel and stick the reinforcement patch on the back to clean plastic and then proceed to the cosmetic side. I will try and get a video demonstrating it up soon.

Another thing worth noting is that I was able to apply polyester putty over top of the repair epoxy as a final skim. If this were a urethane repair adhesive I could not do that or it could bubble off. You can however use an epoxy in between the two. Sometimes it's best to use a urethane on the backside since the dry quickly, then an epoxy on the cosmetic side and you can still apply polyester should you need to.