Cementitious Capillary Crystalline Waterproofing For Basement Product Introduction Cementitious capillary crystalline waterproofing coating is a powdery rigid waterproof material composed of portland cement, quartz sand, active chemical components and functional additives. After mixing with water, it is brushed or troweled onto concrete substrates. When exposed to water, active ingredients penetrate into concrete capillary pores and form water‑insoluble crystals to block