DRYLOK Clear Masonry Waterproofer is the first non-pigmented masonry waterproofer specifically formulated for use on bare masonry floor and wall surfaces. This Patent Pending Technology provides a durable, waterproof, easy to clean, non-yellowing high gloss finish. Perfect for waterproofing interior & exterior concrete floors, poured concrete walls, split-faced block, concrete & cinder block, stone, brick, stucco & pre-cast decorative items. DRYLOK Clear Masonry Waterproofer incorporates ISP CleanGuard, environmentally safe green biocides, to resist the growth of mildew on the dry paint film. DRYLOK Clear Masonry Waterproofer has been tested in accordance to requirements of ASTM D-7088 Resistance to Hydrostatic Pressure at 4 P.S.I. and ASTM D-6904 Resistance to Wind Driven Rain of 98 mph.