All natural stone is porous to some degree. If not properly treated with a protective sealer, water, oils and other liquids can penetrate the stone surface, leaving unsightly stains that can cause damage. DuPont StoneTech Professional Natural Stone Countertop Sealer delivers heavy-duty protection against water- and oil-based stains while preserving the natural look of the stone. This advanced penetrating microbond sealer can be applied to damp surfaces so the job can start and finish sooner. Available in a 24-ounce trigger sprayer, this water-based countertop sealer is great for use on vertical surfaces such as backsplashes and natural stone tile shower walls. DuPont has tested and verified the use of Natural Stone Countertop Sealer on stone surfaces including marble, granite, limestone, travertine, slate, flagstone, saltillo, bluestone and sandstone. DuPont StoneTech Professional Natural Stone Countertop Sealer has been carefully formulated by scientists who understand how to care for natural stone surfaces. This is our latest in a full line of professional grade protect productsincluding the premier BulletProof sealeravailable from DuPont StoneTech Professional.