National Water Repellent is a siliane-siloxane polymer mixture in solvent, having excellent capillary penetrations and adhesion to concrete, natural stones, plaster, etc. This enhances a uniform coating to all capillaries and improves the toughness with excellent water repellency and salt resistance. It is an organic transparent matt clear coating for mineral substrate protection. RECOMMENDED USES National Water Repellent provides excellent water resistance and long lasting protection to concrete and natural stones, without any change in original colour and appearance. It is hydrophobic in nature and is used for the impregnation of building blocks to improve toughness and salt resistance in construction field.