DECK-O-SHIELD is a ready-to-use, water-based sealer/water repellant for concrete and masonry surfaces. Use it as a sealer to limit the penetration of water into structurally sound, crack-free surfaces. Concrete treated with DECK-O-SHIELD will inhibit staining into the surface. The product will not significantly alter the color or tint of the surface after application and causes no adverse effects on surface appearance. It has very low VOC content and is a qualified green building material. W.R. Meadows. 800-342-5976.