The BEHR Premium Protector and Waterproofer is an interior/exterior coating designed to penetrate the surface up to 1/2 in. This product provides a natural clear finish and has a 10-Year Guarantee. This waterproofer creates a barrier inside the surface that keeps water out but allows trapped water vapors to escape, reducing corrosion, spalling, efflorescence and freeze-thaw damage. The protection is not worn away with normal use. It protects long after the water beading is gone. Ideal for use on horizontal and vertical uncoated concrete and masonry surfaces such as: concrete block, pavers, stucco, brick, unglazed tiles, exposed aggregate concrete, sandstone and slate.