Velosit CW 111 Crystalline waterproofing slurry is a high-performance, cementitious, crystalline waterproofing slurry. It is formulated with a blend of cement, fine aggregate and special additives. It is used for the waterproofing of vertical and horizontal surfaces in swimming pools, water tanks, reservoirs, and other structures. It is easy to apply and is resistant to water, salt, and other environmental conditions.