Sandstone Sealer Satin Finish is a professional sealant for porous external natural surfaces. The safe formula is a topcoat protective sealer that creates a durable, clear satin finish. Essential Sandstone Sealer Satin Finish is quick-drying and easy to apply. It provides high-quality protection that prevents water-based stains and general grime & dirt from penetrating into the surface, making it easier to clean and maintain. Clean sealed areas with a mild, ph neutral cleaner or a very low concentration of our outdoor cleaner range. Do not use harsh or abrasive cleaning agents as this can have a negative effect on the treated surface. Sandstone Sealer Satin Finish is not recommended for use on highly polished stone & ceramic glazed surfaces.