PCTFE is a thermoplastic fluoropolymer with excellent mechanical and chemical resistance properties. Exceptional is the wide termperature range it can handle starting from -250°C up to +180°C and melts around 216°C.  This polymer is commonly used for cryogenic applications like gaskets and seals for gas distribution components.

Some active brand names for basic PCTFE material are Neoflon® (Daikin Chemicals) and voltalef® (Arkema). In the past a common used material was KEL-F® from 3M Corporation.

[source wikipedia]

>> Semi finished extruded rod’s and moulded tubes in PCTFE