This product is a new type of elastic waterproof material with good permeability, crystallization and film-forming properties. Hydrogen hydroxy siloxane in its molecular structure reacts with silano groups to dehydrate and crosslink, thereby achieving an "anti-capillary effect" to form an excellent hydrophobic layer, while also having the function of micro-expansion and increasing density. This is the mechanism of the high-efficiency waterproofing effect of silicone waterproofing agents.