One-component room temperature vulcanized silicone rubber

Advantages: One-component room temperature vulcanized silicone rubber has excellent electrical properties and chemical inertness, as well as heat resistance, natural aging resistance, flame resistance, moisture resistance, and air permeability. They can maintain long-term elasticity in the range of -60～200℃. It does not absorb or emit heat during curing, has a small shrinkage rate after curing, and has good adhesion to materials. Therefore, it is mainly used as an adhesive and sealant. Other applications include in-situ gaskets, protective coatings and caulking materials.

Disadvantages: Although the single-component room temperature vulcanized silicone rubber is easy to use, its vulcanization depends on the moisture in the atmosphere, which limits the thickness of the vulcanized rubber and can only be used in occasions where the thickness is less than 6 mm.

Two-component condensation type room temperature vulcanized silicone rubber

Advantages: Two-component room temperature vulcanized silicone rubber has excellent anti-sticking performance after vulcanization, and the shrinkage rate during vulcanization is very small. Therefore, it is suitable for making soft molds, and is used for casting epoxy resin, polyester resin, and polystyrene. Molds for vinyl, polyurethane, vinyl plastic, paraffin wax, low melting point alloys, etc.

Disadvantages: The vulcanization time of two-component condensation type room temperature vulcanized silicone rubber mainly depends on the type, amount and temperature of the catalyst.

Two-component addition molding room temperature vulcanized silicone rubber

Advantages: Two-component room temperature vulcanized silicone rubber can maintain long-term elasticity in the temperature range of 65-250°C, and has excellent electrical properties and chemical stability, resistance to water, ozone, and weathering, plus simple usage and process applicability Therefore, it is widely used as potting and molding material. Various electronic and electrical components are coated and potted with room temperature vulcanized silicone rubber, which can protect against moisture (anti-corrosion, shock resistance, etc.). It can improve performance and stabilize parameters. Two-component room temperature vulcanized silicone rubber is particularly suitable for deep filling The sealing material also has a faster vulcanization time, which is superior to single-component room temperature vulcanized silicone rubber.

Disadvantages: The mixing process needs to be carefully operated to minimize the amount of entrapped gas.