Quote Originally Posted by sybrmike View Post
US Composites is a reliable source and price competitive. Of course, now you get into the whole epoxy vs polyester, matt vs cloth debates. Consensus is that epoxy will stick to epoxy and poly, but poly will only bond well with poly. Epoxy is stronger but more expensive. I used mainly poly & cloth - roven woven and cloth stringer to hull, matt top and bottom of floor and between floor and stringers, cloth floor to hull. I used epoxy & cloth for high stress areas like tower backer plates, new battery divider wall, and new playpen support structure. I'd glass both sides of the floor both for strength and waterproofing. If you don't go back with foam, be sure to add some limber holes where the stringers meet the hull and between x-braces so that the subfloor can breath and dry out.
So if I'm reading you correctly, I would move over to the 635 Thin Epoxy Resin system at US Composits which would be used not only to penetrate the wood and lengthen its life expectancy, but also would be used as the resin to bond the fiberglass matt to the plywood? I wouldn't have thought that it wasn't "thick" enough? or would I purchase a thicker epoxy resin to bond the matt to the plywood after using something like the 635?