Inorganic waterproofing mortar, forms dendritic crystal when there is water. This crystal combines with the concrete together to block out water and other liquid. When the surface and interior of the concrete come out micro cracks, the active substance can hydrated again and produce new hydrated crystal to block out water. So K11 CCCW can make concrete resistant to the water forever. Suitable for places dipping in water all the time, such as swimming pool, drinking water pool and so on.