DRYLOK(TM) Latex Base Concrete Protector provides clear weatherproof protection against deterioration caused by de-icing salt, household cleaners, gasoline, oil, weathering and efflorescence (white, powdery, salt-like deposits visible on masonry). Unique SaltLok Technology penetrates into the surface providing superior resistance to unsightly efflorescence staining often visible on brick, block and poured concrete surfaces.