Drylok® 29913 Latex Base Concrete Protector, 1 GallonProvides clear weatherproof protection against deterioration caused by de icing salt, gasoline, oil, weathering and efflorescence(white, powdery, salt like deposits visible on masonry). DRYLOKs 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,