Leave room for expansion in the sun, if it is the same stuff I used in my last boat it would really expand when it got warm, but it was great on the feet. Still use the squares around the place for kneel pads, changing oil, etc.Dave, I went to HD and bought the gray diamond plate pattern I/2'' thick foam snap together squares for the front of my engine compartment where I stand the most. it's easy to clean I just hose it off with my wash down pump at the end of the day. on your open boat you can do the whole floor and on sale it's really inexpensive. dfly