KILZ Interior/Exterior Basement and Masonry Waterproofing Paint, White, 1-gallon This premium, interior/exterior paint is formulated to waterproof and seal porous concrete and masonry surfaces both inside and outside your home. Using nanotechnology, this paint forms a barrier to help stop water infiltration while an alkali resistant coating provides a long-lasting, durable and decorative finish. Apply this paint on properly prepped and cured above and below grade basement walls, masonry walls, retaining walls, cinder and concrete blocks, stucco and brick. Do not use on floors or on walls with active water leaks. Prime all uncoated, patched, chalky, and adjacent wood and/or metal surfaces with KILZ Premium Primer. For below grade application, fill all holes/cracks with hydraulic cement prior to painting. This is a 1-gallon can of Interior/Exterior Basement and Masonry Waterproofing Paint, White, 1-gallon in white. Depending on surface porosity, 1 gallon covers 75 to 125 square feet per. A minimum of two coats of this product are required for optimal results. Paint dries to touch in one hour and can be re-coated in 4 hours depending on humidity. Apply using a high quality 1/2"-3/4" nap roller, 4" nylon/polyester brush or an airless sprayer capable of delivering 2200-3200 PSI or greater using a .023"-.025" spray tip. KILZ has been making premium primers and paints for 40 years. KILZ was named Paint Brand of the Year in 2015 in the Harris Poll EquiTrend Rankings.