Drylok, Gallon, Latex Base Concrete Protector, Provides Clear Weatherproof Protection Against Deterioration Caused By De-Icing Salt, Household Cleaners, Gasoline, Oil, Weathering & Efflorescence, White, Powdery, Salt Like Deposits Visible On Masonry, Unique Saltlok Technology Penetrates Into The Surface Providing Superior Resistance To Unsightly Efflorescence Staining Often Visible On Brick, Block & Poured Concrete Surfaces.