Xtreme Marine Sealer Clear Guaranteed to never peel or flake while protecting your boat, dock, siding or other wood products Decay and rot resistant while minimizing cupping, twisting, checking, cracking and warping. Powerful insect repellant including termites and highly resistant to unsightly fungus and mold. Can provide sun block up to 55, 65 and 75 SPF. Easy maintenance: after initial application, it can be re-applied after just a quick rinse.