CRYST-O-SEAL is a concentrated, strong, waterproofing slurry cement which provides excellent protection. With its unique chemistry of graded quartz and active chemicals it enables crystallisation to both sides of the substrate. It comes is easy to use fine, grey powder, requiring only added water. The material with coat concrete or cement surfaces against water influx, dampness and ground water. The ease of use means it is an economical and efficient solution for the creation of a waterproof barrier on concrete, cement, plaster and cement brick for the fortification of foundations, basements, tunnels, retaining walls, dams, ponds, pools, silos and sewerage plants.