StoneTech Countertop Sealer for Natural Stone, 24-Ounce (.710L) Spray Bottle Advanced penetrating microbond protection against most stains Water-based formula that can be applied to damp surfaces Great for backsplashes and shower walls Helps preserve the natural look of stone in indoor and outdoor settings Suitable substrates include marble, granite, limestone, travertine, sandstone, flagstone, saltillo, slate, and bluestone