WAXIE Diamond Guard CF Catalyzed Sealer Catalyzed dual component sealer for use on ceramic tile, quarry tile, cement and natural stone. This water based product provides the protection of an impregnator, with the performance and gloss of a urethane ? all with minimal to no change in appearance or color of the surface. It provides superior adhesion without etching or priming and can prevent spalling concrete by causing chemical rebonding. WAXIE Diamond Guard CF Catalyzed Sealer is scratch resistant and UV stable and can be used indoors or outdoors. One gallon kit can cover 250-800 square feet, depending on the porosity of the concrete.