Drylok Clear Concrete Sealer Protector, 5 Gal.Just like natural and man made stone, concrete and masonry are porous materials. They will start to break down, dust, pit, crack, and or stain easily when subjected to weather, water, oil, and UV rays. The only way to prevent damage and deterioration is to protect surfaces with a good quality sealer. Latex base DRYLOK Concrete Protector provides clear, weatherproof protection against deterioration caused by de icing salts, household cleaners, acid,