PCTFE is a thermoplastic chlorofluoropolymer. It’s chemically related to PTFE, and has the lowest water vapor transmission of any plastic. Other names for PCTFE are Kel-F® (a product from 3M) or Neoflon® (a product of Daikin Industries).

What is PCTFE

PCTFE (polychlorotrifluoroethylene) shares many of the excellent qualities of PTFE (low coefficient of friction, high resistance to temperatures, wear and chemicals…), but it also differentiates itself from other fluoropolymers with its mechanical superiority in rigidity. PCTFE’s most striking property is its capability to operate and maintain its elasticity at extremely low temperatures. Other interesting advantages of PCTFE are its very low gas permeability and its low water vapor transmission rate (the lowest of any plastic).

PCTFE’s high compressive strength and dimensional stability make it aptly suited for use as a structural material, especially in applications where the high temperature and chemical resistance is required. Combined with its low outgassing (0,01%) and its wide temperature range, PCTFE is suitable for use in aerospace. Because it can withstand low temperatures up to -273 °C, it is also well suited for the production of cryogenic parts. For accurate dimensions, PCTFE requires special attention during machining. For instance, the choice of tool will be detrimental to achieve the proper dimensions.

Key properties of PCTFE machined parts

Thanks to these key properties, PCTFE machined parts are a brilliant solution for most industrial applications and needs.

  • Diameter: 6 – 700 mm
  • Temperature range: -273 – +170°C
  • Low gas permeability
  • Non-flammable
  • Lowest water vapor transmission rate
  • High rigidity
  • Resistant to chemicals, wear and oxidation

Custom PCTFE applications

These are some of the most common PCTFE applications and use cases.

  • Cryogenic applications
  • Protection of LCD panels (sensitive to moisture)
  • Instrumentation
  • Valves and seals
  • Lining and components for compressor and pumps
  • Aerospace applications
  • Any demanding applications

These options are just examples of the many other PCTFE machined parts we can produce.

PCTFE machined parts at Vanéflon

Vanéflon has over forty years of experience in machining PCTFE into precision parts that flourish in different industries. The knowhow of the Vanéflon team ensures that each part meets the demands of the customer perfectly. Do industry standards in precision tolerances suffice, or do you need them tailored to your specific application? Just a prototype or a full production run? The state-of-the-art machines for complete precision fabricating combined with the in-depth knowledge of PCTFE and its properties will get the job done.

Don’t hesitate to get in touch with our team to discuss the possibilities.

Key properties
  • Dimensional stability
  • High resistance to cold flow
  • Excellent chemical resistance
  • Transparent and colored
  • Near zero moisture absorption
  • Non-flammable
  • High rigidity (difficult to deform)
  • Radiation resistance
  • Cryogenic applications
  • Protection of LCD panels (sensitive to moisture)
  • Film for food and pharmaceutical packaging
  • Valves and seals
  • Protective barrier against chemicals
  • Laminating other polymers (PVC, PP)


Mechanical properties
Hardness Shore D
Sh. D
DIN 53 505
72 - 80
Ball pressure hardness
DIN 53 456
65 - 70
Tensile strength (23°C)
DIN 53 455
32 - 40
Elongation at break (23°C)
DIN 53 455
30 - 120
Tensile modulus (23°C)
DIN 53 457
1000 - 2000
Coefficient of friction v-steel - Dynamic