plastic housing on car broken epoxy worked for a while
it is probably polystyrene - same as models construction kits - don't get poly cement, it is v messy - go to a decent model shop and ask for Humbrol or Airfix poly solvent (100% acetone) - comes in a small bottle with applicator brush - apply to both sides, wait till it becomes tacky and press together. I can't find my bottle, or I'd give you the exact name Or... if there is a nail salon nearby, ask for a bottle of nail tip remover which is also high strength acetone - a useful solvent to keep in your toolbox (carefully) - HTH
Elmer's Instant Krazy Glue.
It called plastic weld it like epoxy but will stay a lot longer I put it on my dirt bike fender and I rode that all sommer in the woods and it stad so got to an auto parts store and ask for epoxy plastic weld it is different the reguler epoxy
There isn't a single glue for all plastics. Each type of plastic reacts differently, so first identify the plastic, and then search for a suitable glue. For example, for ABS, a mix of ABS shavings and Acetone can be used to 'plastic weld'. Acetone (nail varnish) works for PS too. I cheated, the part I wanted to fix was marked as ABS and I googled glue for ABS and then went to the local Screwfix depot and talked to the staff there. As it happened, they had a glue they sold for pipework that would do the trick.
