Bonding turn signal fixture to damaged bumper

Most likely. I doubt you will have any trouble with it coming out once it's epoxied in place. Is it possible you can build up the place with the light used to screw into and reconstruct a screw pad so you can bolt it on again?

Vibration should not affect a good epoxy bond. Key to success is clean surfaces and no disturbance during bonding. Acetone will do a good job cleaning, but might be hard on the plastic surfaces. 99% isopropyl alcohol would be safe, if not quite as effective in cleaning.

You might also try a product called Goop. There is an automotive version of this. It is a flexible bonding agent. The main drawback to it is long cure time. You would need to leave it undisturbed for 24 hours. Dan

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Note that the five-minute epoxies do not handle water exposure as well as the longer-curing types.

Goop is a urethane adhesive, a higher grade version of contact cement. It is thicker than the 3M weatherstripping cement and cures to be a little bit stiffer. It's good stuff for anything that flexes, like bumpers.

--scott

What is "Plastic?"

What kind of "plastic?"

The "Plastic Welder" I know of is not an epoxy at all but a solvent-type adhesive. It works well on most thermosetting plastics, but not as well as epoxy on phenolics.

--scott