After considerable testing and tearing up a lot of this stuff I think I have figured out a good way to use it on a boat deck. Resawn to 1/4 inch by 2 inch and dovetailed on the underneath. It seems to stick extremely well to plywood using polyurethane (PL Roof Repair) glue. I tried several kinds and brands of epoxy but they all gave up after weeks or sometimes months of exposure. The best epoxy was FCI's 4 to 1 using milled fiber as a filler to mayo thickness. Triple dovetails give the planks a mechanical grip, neccessary because nothing wants to stick to the polyethylene in the stuff. The best plank material I have found is Tropics made by Veranda, it has more wood and less P E. I used the "no screws or bungs" system to fasten the material to plywood. Screws and fender washers to hold it down until the glue sets up. Then pulled the screws and filled the grooves with PU. The screws set the spacing between planks, so no holes in them. So far it looks like this could be a very good way to get a great nonskid deck that is WAY tuff and looks pretty good to. Zero maintenance is also nice, plus, under the stuff is pure polyurethane so water will have a tough time getting through it. What do you guys think ?