Mine are not installed in the car yet, but I intend to use an epoxy of some type. Not sure exactly which one yet. I need to do some flight research, I don't want to be messing around in those door cards again (which I've now told myself at least five times).
My plan was to use hot glue to secure the light bars though. Maybe I need to rethink that. Or see if there are different specs for hot glue.
When I did the park assist sensors on my front and rear bumpers, my parts guy recommended this stuff. It hardens extremely well but remains flexible. The kit comes with the torturous path mixing tube. Get a couple more of those to avoid having to mix it by hand. It does not work well when mixed by hand. Ask me how how I know.Hot glue collapsed after some hot days... hence why I'm looking for another material. If you have a nice expoy to recommend lmk...