Zinsser Watertite is a mould and mildew proof, waterproofing 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 an oil-based formula that combines a state of the art waterproofing resin with Portland cement to create a strong coating. Watertite also contains a mildewcide 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 odour formula that has even less odour 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.