All right everybody I took your advice and tore up the floor and sure glad I did! the foam was like a block of ice, worse than I thought. I will be replacing the rivets that look bad but the PO tried to put silicone and jb weld on some if it. But I want to gluvit the inside. 2 question is should I just do the seams and rivets inside or do I have to do the entire floor. its a 16 foot lund how much should I get to do this? Thanks everybody!