For use on porous mineral surfaces such as stone, brick, concrete, cement, terra cotta, unglazed tile, and grout. By creating a transparent subsurface barrier which gives water and oil repellency, it makes the surface stain resistant. This allows for easy cleanup of most spills and quicker dry times. It is non-yellowing for long lasting interior/exterior applications. This subsurface sealer provides durable protection without leaving a visible film, allowing the natural beauty of the stone to show.