(1) High and low temperature resistance
      Among all rubbers, silicone rubber has the widest operating temperature range (-100 to 350°C). For example, properly matched vinyl silicone rubber or low-phenyl silicone rubber can maintain elasticity after being aged by hot air for thousands of hours at 250°C or hundreds of hours at 300°C; low-phenyl silicone rubber vulcaniz It can still maintain elasticity after hours of hot air aging. Its glass transition temperature is -140℃, and its vulcanizate is still elastic at a temperature of -70～100℃. When silicone rubber is used as a heat-proof coating on the inner wall of a rocket nozzle, it can withstand instantaneous high temperatures of thousands of degrees.
(2) Ozone aging resistance, oxygen aging resistance, light aging resistance and weathering resistance performance
     After the silicone rubber vulcanizate is exposed to outdoor exposure in a free state for several years, there is no significant change in its performance.
(3) Electrical insulation performance
The electrical insulating properties of silicone rubber vulcanizates change little when exposed to moisture, frequency changes or temperature rises, and the silicon dioxide generated after combustion remains an insulator. In addition, there are few carbon atoms in the molecular structure of silicone rubber, and no carbon black is used as a filler, so it is not prone to scorch during arc discharge, and it is very reliable to use in high-voltage applications. Its corona resistance and arc resistance are excellent. The corona resistance life is 1000 times that of PTFE, and the arc resistance life is 20 times that of fluoroelastomer.