High-Gloss Clear Latex Masonry Waterproof Sealer 1 gal Drylok clear masonry water proofer has been tested in accordance to requirements of ASTM D-7088 resistance to hydrostatic pressure at 4 per square inch and ASTM D-6904 resistance to wind driven rain of 98 miles per hour.Drylok clear masonry water proofer is the first non-pigmented masonry water proofer specifically formulated for use on masonry floor and wall surfaces.