STONETECH®Heavy Duty Sealer is a heavy-duty sealer that protects against most stains on a variety of stones, all while preserving the natural look of the stone. It is recommended for use on marble, granite, travertine, slate, saltillo, and bluestone. Now built with Microban^® Antimicrobial Technology! This water-based penetrating sealer provides advanced stain and antimicrobial protection while preserving the natural look of the surface.