Zinsser Drygard Waterproofing Paint in White helps keep moisture from passing through properly prepared concrete and masonry. This low-odor, water-based coating creates a smooth, flat finish for interior and exterior concrete block and cast-in-place concrete, making it a practical choice for basements, cellars and other damp areas. When applied as a complete system, it resists up to 10 PSI of water pressure. Apply at least two coats, working the first coat into surface pores; highly porous block may need a third coat. This 5-gallon container provides approximately 1000–1250 square feet of coverage per coat, depending on the surface and application. It dries to the touch in about 2 hours, with 2–3 hours between coats under recommended conditions, and cleans up with soap and water. For best performance, repair cracks and prepare the surface before coating. Not intended for swimming pools or contact with drinking water.