You all have been talking about 3M77 I bought some, very expensive stuff, and did some tests (I was lucky I tested it) it melted my foam. I asked some questions and tested again (held it far away from foam) it still melted my foam. Through all my test I found water proof wood glue cut with water works best for me. Water proof because white glue is cheaper and just as good but the covering comes off in the rain???