"jeffc" wrote:
You know that gray foam rubber/styrofoam stuff they sell to insulate copper
pipes? Does anyone know a good glue that would work to seal this stuff to
itself? Something that sort of "melts" the foam slightly to form a "welded"
bond would be best. (I think that's the sort of thing that happened with
plastic models and model glue I used as a kid.)

I know this does not answer your question - but it is related. Lowes
makes that foam insulation with glue on it - you peel off a protective
coating and stick the edges together.

Harry