Our Porta-Bote dinghy came with foam for flotation. We were grateful to have it that time our dinghy became stuck under a dock. It kept the dinghy from sinking all the way to the bottom. Porta-Bote when new two years ago I vaguely remember reading that the foam should be covered to avoid UV degradation. After two winters in the Bahamas the foam has started to degrade. The last time we used the dinghy we noticed powdery black stuff in the bottom of the dinghy. We didn’t find a lot online about how to best cover it. One post on the Porta-Bote users group recommended gluing fabric onto the foam. I have a good vinyl glue (HH-66) that would work for the Stamoid vinyl fabric but I wasn’t sure it was compatible with the foam. I didn’t want to put glue on the foam and have it disintegrate even more. Our best guess is that the foam is made of polyvinyl ethylene and the HH-66 can said it is not to be used on polyvinyl ethylene. We decided to try to use the 3m Dual Lock (which I call super-dupe