Product Short Description: Best and Economical products for Concrete & Brick Sealer for protection of damp and water penetration through brick, cement and concrete. Product Description: Best and Economical products for Concrete & Brick Sealer for protection of damp and water penetration through brick, cement and concrete. It has a unique action that acts as a one way valve allowing the vapour out but not allowing the water in due to its high water reppellent in nature. RXSOL All Purpose Concrete, Brick, & Stone Sealer is a penetrating, silane-siloxane water repellent that bonds beneath the surface of concrete and masonry surfaces to protect against the damaging effects of water. This product can be used on any exterior, above-grade, untreated concrete or masonry surface. It is non-film forming, and will not alter surface color or appearance to most surfaces when properly applied. This product can be used on any exterior, porous concrete or masonry surface including: concrete wall sealer, concrete driveway sealer, concrete sidewalk sealer, concrete patio sealer, brick wall sealer, brick walkway sealer, brick patio sealer, cultured stone wall sealer, manufactured stone wall sealer, stone veneer sealer, and any surface made with sandstone, limestone, natural stone, or porous granite surface. For best results, use RXSOL All Purpose Concrete & Masonry Cleaner to clean the surface before using this product. Note: this product is not designed for interior use.