Silicone rubber is odorless and non-toxic, not afraid of high temperatures and resistant to severe cold. It is "comfortable" and "unchanging color" at 300 degrees Celsius and minus 90 degrees Celsius, and still has good strength and flexibility. Silicone rubber also has good electrical insulation...

Polyperfluoroethylene propylene FEP or F46 is a copolymer of tetrafluoroethylene and hexafluoropropylene. The content of hexafluoropropylene is about 15%. It is a modified material of polytetrafluoroethylene. Teflon FEP: FEP (Fluorinated Ethylene Propylene Copolymer) non-stick coating...