Need to repair my OEM bumpers. Anyone used "3M" or "Eastwood" urethane bumper repair kit, let me know what to buy. 3M is expensive but is it worth it? Eastwood is less expensive but will it last for 1 week, 1 year, 1 decade?

 

I use 3M Automix Plastic Repair and metal mesh to fix bumpers.

 

Not to thread jack but which product exactly?I have been under the impression that certain types of plastics have mold release agents and require different types of adhesives.#m has quite a few differnt types of plastic repair products

 

This for flexible parts like bumpers:

 

Ok that clears things up a bit.3m has a few videos on how to repair bumpers but they tend to use 4 to 5 products on one repair and at the cost of the supplies it makes more sense to buy a new bumper.I on the other hand am repairing a mugen ek9 front lip so I have to fix it.

3M also has a flexible tpo patch to apply to the rear of the bumper when repairing it.

 

Yeah, you don't have to use all of their products like I am sure they want you to.

You basically just want to cut/grind out any area that has come in contact with a crack or split, sand out a 3-4 inch radius with course paper (80-100), clean thoroughly, use some sort of wax/grease remover, use an adhesion promoter, and apply the Automix and/or your patch material of choice.

 

When you say cut do you mean open up the crack a bit and bevel the edges or do you mean to actually cut it out?Sorry I just figured since you are being nice enough to answer the questions I would ask everything needed to do the job correctly.

 

I guess think of the crack as 'cancer' and make sure to remove all the 'infected' material.

Like if you have a hairline crack, take a cutoff wheel and cut out every part of the plastic that touched that crack, then go ahead and bevel out the edges. I hope that make more sense, haha...

 

That is the product i was talking about. Have you also heard about Eastwoods flexible/rigid filler, similar to 3M? It is about $20, the 3M is about $60. I would prefer 3M because they know their chemicals and materials very well. I want to make sure i am spending my money wisely. Well, off to the supply house to see if they have it.