RJ-H80 is a new type of rigid waterproof material for building with good permeability and crystallinity. Crosslinking reaction happens between Si-OH in themolecular structure and Si-OH in silicate materials under the condition of moisture. So-called “anti-capillary effect” occurs to form an excellent waterpoof layer. At the same time, it will have the effect of microdilatancy and increasing the compactness.