Hot answers tagged adhesive
If you can, I would recommend cutting down the joint with a thin bandsaw blade & then machining both pieces with a jointer to get the super tight fit that you really should have between your boards. The reason I suggest this is that cutting boards can give up particles when sliced/chopped on that would end up on the food that is processed on the cutting ...
Forget trying to glue it, repair it some other way. "McGyver" it. Like maybe buy a lock hasp of appropriate size and use the staple, which is the piece that the lock shackle would go through (see picture). Sorry I could not find a picture of just the staple. Screw the staple to the speaker body and the staple hole would rest in the base, aligned with the ...
For drain covers with no screw holes and no option of screwing in itself we usually slap some plumber's putty on the bottom and smash it in. With a screwdriver and a few tugs you can remove and reuse again but should keep it from moving.
If it's polystyrene, you'll probably get the best bond with modelling glue - it's as close to a weld as you can get with that type of plastic. You'll want to get all of the epoxy off first though - otherwise you won't get a decent weld. Since it is obviously a high stress part, I'd drill and pin it with piano wire in at least a couple places. That said, I ...
It is a good idea not to glue or make the grate non-removable in case access to the drain is needed in the future. For a fast non-adhesive fix to keep the grate in-place wrap a rubber band around the grates edge.
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