Room temperature vulcanized silicone rubber generally includes two categories: condensation type and addition type. Addition molding room temperature adhesive is based on linear polysiloxane with vinyl groups as the base adhesive, with hydrogen containing siloxane as the crosslinking agent. In the presence of a catalyst, it undergoes crosslinking reaction at room temperature to medium temperature to become an elastomer. It has good heat resistance, hydrophobicity, electrical insulation, and excellent physical and mechanical properties, especially in terms of tensile strength, relative elongation, and tear strength, due to the introduction of active end groups. It is suitable for various vulcanization methods, such as radiation vulcanization, peroxide vulcanization, and addition vulcanization, and is widely used in areas such as heat resistance, moisture resistance, electrical insulation, and high-strength silicone rubber products.

Condensed room temperature vulcanized silicone rubber is a type of silicone rubber characterized by the condensation reaction between silicone hydroxyl groups and other active substances, which can be crosslinked into elastomers at room temperature. The product is divided into two forms: one component packaging and two component packaging. One component room temperature vulcanized silicone rubber (RTV-1 rubber for short) is one of the main products in condensed liquid silicone rubber. Usually formulated from basic polymers, crosslinking agents, catalysts, fillers, and additives. The product is packaged in a sealed hose, which is extruded during use and can self vulcanize into an elastomer after contact with air, making it extremely convenient to use. Vulcanized rubber can be used for a long time in the temperature range of -60~+200 ℃, with excellent electrical insulation performance and chemical stability. It is resistant to water, ozone, climate aging, and has good adhesion to various metal and non-metallic materials. Mainly used for coating various electronic components and electrical equipment, the packaging material plays an insulation, moisture-proof, and shockproof role; As a surface protective material for semiconductor devices; It can also be used as sealing filler and elastic adhesive.

Two component room temperature vulcanized silicone rubber (RTV-2 rubber for short) is not as convenient to use as RTV-1 rubber, but its component ratio is varied. One variety can obtain various specifications and properties of vulcanized products, and can also be deeply vulcanized. Therefore, it is widely used in industries such as electronics, automobiles, machinery, construction, textile, chemical, light industry, printing, etc. as insulation, packaging, caulking, sealing, moisture-proof, seismic resistant, and roller making materials. In addition, due to its excellent demolding performance, RTV-2 is widely used as a soft mold material for the replication and manufacturing of cultural relics, handicrafts, toys, electronic appliances, mechanical parts, etc.

In addition to building sealants, RTV also includes sealing materials used in industries such as aerospace, nuclear power plants, electronics, machinery, and automobiles, silicone sealing materials used for electronic component sealing, and silicone mold adhesives used for soft mold materials. The demand for these varieties is relatively small, but they are indispensable in many occasions.

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