CRETOPROOF CRYSTAL-COAT is a state-of the art one component, penetrating crystalline material for waterproofing and protecting new or old structurally sound concrete. It resists strong hydrostatic pressure. CRETOPROOF CRYSTAL- COAT is powered by advanced crystalline technology which chemically reacts with moisture and free lime to reduce the water absorption of the resultant cement matrix within the concrete. This is a result of the formation of nano-scale crystals by the active catalysts present in the capillary system. This sustains a durable waterproof effect in the concrete, thereby blocking the passage of water. This reaction will continue to take place anytime water is present for the life of the concrete structure where by making the CRETOPROOF CRYSTAL-COAT a truly permanent and integral waterproofing solution. The CRETOPROOF CRYSTAL- COAT nano-crystals will also grow in and along static hairline crack sealing them and preventing further incoming water.