PTFE rubber seals, when used for engine sealing, can work for a long time at 200 ℃ ~ 250 ℃, and work for a short time at 300 ℃, and their working life can be the same as the engine repair life, up to 1000 ~ 5000 flight hours (time 5 ~10 years);
For high vacuum applications, when the flying height is 200~300Km, the air pressure is 133×10-6 Pa (10-6mmHg), neoprene rubber, butadiene rubber, butyl rubber can be used; when the flying height exceeds 643Km, The air pressure will drop below 133×10-7Pa (10-7mmHg), and only fluorine rubber can be used in this high vacuum. Generally, high-temperature baking is required before high-vacuum or ultra-high-vacuum device systems are used. Model 26 and 246 fluoroelastomers can withstand high-temperature aging from 200°C to 250°C, making them the main rubber materials in high-vacuum equipment and spacecraft. .
Fluorine rubber is suitable for high temperature resistance, oil resistance and special media resistance, such as aircraft fuel oil, hydraulic oil, synthetic diester oil, high temperature hot air, thermal inorganic and other special media (such as chlorinated hydrocarbons and Other chlorides) transportation, guidance, etc.

Wires and cables made of fluorine rubber have good flexibility and good insulation. The glass fiber tape made of fluorine rubber can withstand high temperature of 300℃ and resist chemical corrosion. After the aramid cloth is coated with fluorine rubber, it can be used to make the connection expansion pipe between the high temperature resistant, acid and alkali resistant storage tanks of the petrochemical plant (the two ends can be connected with metal flanges), which can withstand high pressure, high temperature and medium corrosion and the deformation and expansion of the two tanks play a role in buffering and shock-absorbing connection. The rubber-cloth sealed bag made of nylon cloth coated with fluorine rubber is used as a soft seal for the inner floating roof storage tank of an oil refinery to seal and reduce the volatilization loss of the oil level.