Miracle Sealants 511 Impregnator is a penetrating sealer designed for the protection of all medium to dense porous surfaces. Forms a transparent layer strong enough to combat moisture and stains while allowing vapor release. 511 Impregnator does not alter the natural look of the surface following application. Provides water, stain and slip protection for interior and exterior tile and natural stone surfaces. Surfaces treated become harder and less slippery.