I am fiddling around with a project that requires some stabilizing. I will use the type of white stiff "plastic" foam used in stabilizing stuff for shipping. I need to be able to "stack" bits and pieces to contain things from moving around in transit, so I need to glue layers of material to get depth. I know it can be done as I have reclaimed this type of foam and it was glued in layers. So far I have tried ordinary white Elmer's glue, Gorilla glue and they both just snap apart after they dry. Any suggestions? Thanks.