ICT 171-2.5G 2.5 gal Stone Show H2O Invisible Water-Based Natural Stone Sealers is a breathable, penetrating, water-based protectant and water-repellent designed to be used on natural stones, concrete, and other properly prepared masonry surfaces. Stone Show H₂O acts as a protective shield against staining, simplifies maintenance and cleaning, and prevents deterioration of the substrate caused by water presence and contaminates carried by water.