Drylok Clear Latex Concrete Protector 1 gal. (Pack of 2)Drylok 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). Drylok unique SALTLOK technology penetrates into the surface providing superior resistance to unsightly efflorescence staining often visible on brick, block and poured concrete surfaces. Drylok concrete