Boat seat foam and glue Regular foam that you normally use same with the sew foam. I also use Landeu top and trim for glue. They also have the pre pleated vinyl that is marine grade. I have used that before and holds up good. A boat interior lasting 10 years and he wants if fixed, I’d tell him to piss up a rope. I haven’t seen a boat interior last more than 10-12 years. I have also seen a 2 year old boat that looks like it has 10 years of use. It really depends on how the customer takes care of it, and weather they use a boat cover,l at a pier, or store it indoors between uses.