Highly hydrogen-containing silicone oil is mainly used as a waterproofing agent for waterproof gypsum boards, gypsum waterproof boards, gypsum blocks and other products. The water absorption rate is less than 10%, which meets the standards. Under the action of metal salt catalyst, it can be cross-linked to form a film at low temperature, forming a waterproof film on the surface, which is moisture-proof, mildew-proof, rust-proof and breathable.