STONE SPRAY-SEAL® XP water-based sealer provides amazing protection on all extra porous stones such as fine grained granites, flamed granite, tumbled marble, limestone, slate, concrete, sandstone, flagstone and grout. Perfect for interior and exterior use. This below surface sealer replels all water and oil-based contaminants and prevents them from absorbing in, yet allows the stone to breathe. Durable, log-lasting and will not change the color of the stone.