Working Principle: Hydrogenated silicone oil's two non-polar molecules, silane (Si-O) bonds and methyl (-CH₃) groups, repel moisture. Under the action of a catalyst, it crosslinks at low temperatures to form a dense film, which adheres firmly to the substrate surface through chemical bonds, achieving highly effective and long-lasting waterproofing, moisture-proofing, and multifunctional enhancement.

1. Building Materials and Substrates: Used on surfaces such as glass, ceramics, metal, cement, marble, and stone, it forms a dense waterproof film, improving water resistance and service life. Specifically designed for decorative materials such as gypsum board and gypsum blocks, it significantly reduces water absorption (e.g., to <10%, meeting national standards).

2. Fabric Finishing: Used on fibers such as cotton, linen, silk, acrylic, and polyester, imparting water and stain resistance, improving hand feel, drape, and tear strength. Used in conjunction with hydroxyl silicone oil emulsions, it maintains breathability. Finishing Principle: Chemically, the Si-H bonds in high-hydrogen silicone oil molecules are highly reactive. Under the action of metal salt catalysts (such as tin and zinc salts), they react with hydroxyl groups (-OH) on the surface of cellulose fibers (cotton, linen, etc.) or amino groups (-NH₂) on protein fibers (silk, wool), forming stable Si-O-C or Si-N-C covalent bonds. This bonding firmly anchors the siloxane backbone to the fiber surface, enhancing its functional durability. Furthermore, the residual Si-H bonds hydrolyze in the presence of moisture and carbon dioxide in the air to form silanols (Si-OH), which further condense and cross-link to form a three-dimensional elastic network film that covers the fiber surface. Physically, the methyl groups (-CH₃) of the siloxane chain segments align on the fiber surface, forming a hydrophobic layer with low surface energy (20-24 mN/m). This significantly reduces the surface tension of the fabric, achieving a water droplet contact angle >90° and achieving water repellency and stain resistance. On the other hand, the polysiloxane backbone is highly flexible, wrapping around fibers through physical adsorption, reducing interfiber friction and significantly improving fabric softness, smoothness, and drape. The effect is even more pronounced when used in conjunction with methylhydroxy silicone oil, such as in an emulsion.

3. Powder Materials: This material can be used to treat dry powder fire extinguishing agents, mica, clay, and other materials, preventing clumping and improving fluidity.