Foamboard Glue

[e-paw]

I used both forms of liquid nails on my layout without a problem, but I also glued foam to plywood not foam to foam. I can't see what difference that could make. I also used the blue foam not the pink kind, I don't know if that makes a difference ether. The only time that I noticed anything like that was when I used hot glue, even the low temp stuff melted the top 1/16 inch or so of foam.