Glaze 'N Seal Stone Sealant Impregnator is a penetrating sealer that provides a natural look for all types of fine stone, including marble, tile, and masonry. It is a breathable oil and water repellent that offers stain and mildew resistance without using harsh solvents. Because there are no unpleasant odors or severe health concerns when using this product, it can be used indoors. It does not leave a surface coating and can be used as a pre-sealer and grout sealer. Glaze 'N Seal Products, 800-486-1414,