I have a wood boat, which is for sale on this site by the way. It is screwed into the bottom, into the keels and chines. My experience is limited to wood. I can't imagine getting this stuff to stick to any surface with anything other than screws. UHMW does expand and contract at a much higher rate than wood or aluminum, so get your sheet warm in the sun, with your boat inside in the shade before you attach it, or it will be an irregular surface in the summer warmth.