Anvil AquaSeal II High Solids Waterproofing Sealer is fast drying,water clean up, environmentally friendly, penetrating sealer/primer for porous vertical surfaces. It is specially formulated with 25% clear acrylic resins that penetrate and bind to low density masonry. The dried film is resistant to mildew for it contains agents which inhibit the growth of mildew on the surface of the sealer film and is also resistant to acids, and salts. AquaSeal II provides a tough and flexible film with excellent scrub resistance and weatherabiliy. May be tinted with latex paint or stain. May be mixed with equal parts of latex paint for use as a primer. Mix with exterior latex paint to increase weatherability of the paint. May also be used as a binder sealer by adding one gallon of AquaSeal II to five gallons of block filler. AquaSeal II is an exceptional binder for heavily chalked surfaces to improve the adhesion of paint topcoats. AquaSeal II protects and seals vertical surfaces of CMU (Concrete Masonry Units), Tilt-Up, Decorative & Fluted Block, Split Face Block, Low Density Brick, Stucco, Limestone, Coral, Grout, Adobe, Chalky Surfaces, Terra Cotta Roof Tiles, Roof Shingles, Pottery and many other porous surfaces. Elimination of cascading or ponding water must be addressed prior to AquaSeal II application. Designed for above grade use only and should not be used on applications exposed to hydrostatic water pressure. Waterproofing Sealer has surpassed requirements for water repellency set forth in Fed. Spec TT-C-555B, Section 3.3.3.