DRYLOCK WHITE LATEX|UGL’s Drylok is a latex-based masonry waterproofer with a low-odor, easy-cleanup formula. It can be used on interior or exterior walls, above or below grade masonry, cinder and concrete blocks, or on stucco, brick, retaining walls, basements and foundations. No premixing or pre-wetting necessary. It withstands 10 pounds of hydrostatic pressure, greater than a wall of water 22 feet high, and creates a breathable film that does not trap moisture.