Cem-Kote Flex ST is a polymer-modified cement membrane, which can be easily applied by brushing or with spray equipment for larger applications. It is suitable for waterproofing water and wastewater tanks, secondary containment structures, tunnels, concrete slabs, balconies, and patios with light to medium traffic. W.R. Meadows Inc. 800-342-5976. www.wrmeadows.com