STONETECH Impregnator Pro Sealer is a solvent based, penetrating sealer that provides advanced stain protection on natural stone, tile, masonry and grout surfaces.   It blocks out oil and water based stains by impregnating into the surface without changing the original look or finish. Effective in interior and exterior applications, STONETECH Impregnator Pro Sealer comes with a 25 year product guarantee.