Zinsser Watertite is a mould and mildew proof, water proofing paint and is ideal for sealing cellars, basements and other masonry surfaces. This sealer is guaranteed to keep water out (on bare masonry) and keep mould and mildew away for a minimum of five years. Zinsser Watertite has a oil base formula that combines a state of the art water proofing resin with Portland cement to create a strong coating. Watertite also contains a mildew-cide to prevent the growth of mould and mildew on the paint film only, for a minimum of five years after application, making it great for masonry surfaces where mould and mildew can be a problem. Watertite can be applied to dry, damp or wet surfaces, so water problems can be resolved immediately. It can also be re-coated in just four hours and dries to a smooth, bright white finish that resists dirt and dust pick-up. Watertite is an ultra low odor formula that has even less odor than standard emulsion paint. It adheres to any interior or exterior masonry surface, above and below grade and is formulated to prevent efflorescence on concrete and cinder block.