Tenax Hydrex Stone Sealer is both waterproof and oilproof. Excellent for granite, carrara, Thassos, Trani, Botticini, marfill and similar stones. It is especially effective on polished granite and polished marble. Tenax Hydrex Sealer allows the stone to breathe to maintain its natural characteristics. Tenax Hydrex Sealer may be used both indoors and outdoors. It does not change the color of the stone. Tenax Hydrex Sealer operates on the surface of materials.