Automotive Plastics: adhesive, plastic polymer, plastic welding

Question
Is there an adhesive or plastic welding that will
bind two pieces of plastic together?   I tried super glue.
It works somewhat but falls apart.

       Thanks,      Dick

Answer
Hi Dick, there may be one at least or a method to weld them either chemically or by thermal fusion.
However, what we need to positively indicate a proper one is to know the nature of the plastic(polymer): thermoplastic? composite?, elastomer? it is affected by solvents or heat in any way? The best way to achieve this is by looking for the plastic code in the plastic or by making some tests. Please indicate what the plastic is for, its function and provide as many details as you can...