This product provides clear weatherproof protection against deterioration caused by de-icing salt, gasoline, oil, weathering and efflorescence(white, powdery, salt-like deposits visible on masonry). DRYLOK's 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. Soap and water clean-up. Ideal primer prior to applying latex masonry coatings.