Note - PTFE is a registered trademark of duPont de Nemours and Company
PTFE (aka PTFE, TFE) can be used in applications with extreme temperatures, extreme pressures and extreme chemicals. Since PTFE has a tendency to cold flow and has no memory, it is often filled with other materials (glass, bronze, and nickel) before it is used to make piston seals, rod seals and wipers.
Temperature Min: -200oF
Temperature Max: 500oF