Drylock, gallon, clear, non-pigmented masonry waterproofer, specifically formulated for use on bare masonry floor & wall surfaces, patent pending technology provides a durable, waterproof, easy to clean, non-yellowing high gloss finish, it’s perfect for waterproofing interior & exterior concrete floors, poured concrete walls, split-faced block, concrete & cinder block, stone, brick, stucco & pre-cast decorative items, environmentally safe green biocides, resists growth of mildew on the dry paint film, been tested in accordance to requirements of asti d-7088 resistance to hydrostatic pressure at 4 psi & asti d-6904 resistance to wind driven rain of 98 mph.