>>
> I tested rubber cement and shoe goo by placing a drop of each on pink
> foam.  I was looking for something that would glue the foam together
> and dry fast.  Rubber cement dissolved the foam right away.  The shoe
> goo didn't do much, but I should have looked later. After a few
> minutes, the shoe goo dissolves the foam way too much to use it as a
> glue, but not quite as much as the rubber cement did.
>
> I found this out today when I tried to glue another piece of foam to
> the mold I'm making for my cooling plenum.  I retested the drops of
> shoe goo and rubber cement on another piece of foam but let them sit a
> little longer. The rubber cement dissolved almost all the way thru a 1
> inch thick piece of foam.  The shoe goo ate about 1/2 or 2/3 of the  > way
> thru, but left a film of shoe goo over the "pit".  The shoe goo dollop
> may have been smaller than the rubber cement dollop.
>
> So far I've successfully stuck the foam together with silicon bath tub
> caulk and 5 minute epoxy.  I also filled the voids with the
> poly-urethane foam that comes from the hardware store in a spray can.
> This stuff sticks to almost everything.  BTY, shoe goo does not  > dissolve
> poly-urethane foam.
>
> Bob W.
>
>

Bob, I have used 3M spray glue #77 from Home Depot on styrofoam.  Works well without disoving it much.
Buly