PCTFE is Widely Used For:

  • Cryogenic and chemical processing components
  • Seals and gaskets
  • Aerospace valve seats, pump parts, impellers,
    diaphragms, and plugs
  • Laboratory instruments
  • Nuclear service/high radiation exposure
  • Liquid oxygen and liquid nitrogen valve linings

Performance Characteristics:

  • Dimensionally stable, rigid, and resistant
    to cold flow
  • Very low gas permeation and outgassing
  • Near zero moisture absorption
  • Excellent chemical resistance
  • Useful temperature range: –400°F
    to 380°F
  • Radiation resistance

Common Brands:

  • Neoflon®
  • Kel-F®
  • Aclon®


Fluoropolymer with outstanding dimensional stability, mechanical properties, and temperature range

PCTFE (polychlorotrifluoroethylene), commonly referred to as Kel-F® or Neoflon®, is a fluoropolymer material with outstanding strength, stiffness, and dimensional stability. PCTFE has excellent chemical resistance, radiation resistance, and flammability characteristics. The material has a useful temperature range of -400°F to 380°F. PCTFE is resistant to cold flow and it has the lowest coefficient of thermal expansion of any unfilled fluoropolymer. These characteristics make it an excellent choice when dimensional stability is critical. PCTFE is often used for aerospace applications when chemical resistance, a broad operating temperature range, and low flammability are required. It is also extensively used for cryogenic valve applications. 

PCTFE FDA Compliant grades available.

Shop for PCTFE


SHEET Dimensions:
12 in x 12 in – 24 in x 24 in
0.125 in – 2.750 in
ROD Outside Diameter:
0.125 in – 2.750 in
COLOR Natural
GRADES FDA Compliant

Length, width, thickness, and diameter tolerances vary by size, by manufacturer, brand, and grade. Custom sizes available upon request.


Typical properties of PCTFE
Specific gravity   D792 2.11 - 2.17
Water absorption % D570 0
Tensile strength psi D638 4,860 - 5,710
Elongation % D638 100 - 250
Izod Impact (notched) ft-lbs/in D256 2.5 - 3.5
Flexural strength psi D790 9,570 - 10,300
Dielectric strength (68 mil film) volts/mil D149 500

Values may vary according to brand name. Please ask your Curbell Plastics representative for more specific information about an individual brand.

Need more information about this material? Use our interactive plastic properties table