Dry-Treat 40SK is a penetrating, invisible and breathable sealer that protects porous tile, natural stone, paving and grout from damage caused by water and salts, while consolidating friable surfaces. Provides long lasting protection and comes with a 15 year warranty*. Dry-Treat 40SK can be used on limestone, sandstone, terracotta, cast stone, engineered concrete, paving, brick and grout.