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 protector seals bare masonry surfaces against dusting, staining, surface cracking and pock marking.