Tenax Hydrex Stone Sealer is a penetrating sealer that prevents liquids (stains) from penetrating into the material through it micro-porosities. Tenax Hydrex Stone Sealer is both waterproof and oil proof. Excellent for granite, carrara, Thassos, Trani, Botticini, marfill and similar stones. It is especially affective on polished granite and polished marbles. 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.