I've had problems with white glue/elmers glue.
1. I didn't paint or seal the foam first, and it bled through a 2" thick piece of foam onto the surface below.
2. It never really dried. I had used it for a Christmas display and when I took it down after Christmas, it was still not dry in between two pieces of foam.
Since then, I've used the WS stuff with great results and also Liquid Nails for Foam.
Good Luck.
