top of page

Are KEL-F® and PCTFE the same?

What is Kel-F? Kel-F® was a trade name for PCTFE (polychlorotrifluoroethylene) utilized by the 3M® Company. In 1995, 3M sold the rights to Daikin® Industries, Ltd, who produces the raw material today under the trade name Neoflon®. PCTFE with the brand Kel-F is no longer available in the marketplace.

What is Neoflon PCTFE M-400H?

Neoflon PCTFE M-400H is a fluoropolymer that has high tensile strength, dimensional stability, and retains its high-performance properties over a large temperature range (-400° to 380°F). This grade of PCTFE has superior mechanical characteristics and gas barrier properties to PFA and FEP. PCTFE is melt-processible, and can be extruded or molded into sheets, rods or tubes.


What are the Benefits & Advantages of PCTFE?

  • Excellent thermal and chemical stability

  • Low gas permeation and outgassing

  • Very low moisture absorption and permeation

  • Highly resistant to cold flow

  • Very rigid and tough

  • Excellent dimensional stability

  • Extremely good low temperature properties to -400°F

  • High chemical-resistance

  • Resistant to oxidation

  • High compressive strength

  • Non-flammable

  • Radiation-resistant

What Types of Products can be Manufactured from PCTFE?

  • Lip seals

  • Valve seats & stems

  • O-Rings

  • Gaskets

  • Washers

  • Sleeve & thrust bearings

  • Bushings

  • Liner for chemical applications

  • Impellers

  • Diaphragms & plugs

What Applications are Products Made of PCTFE Used In?

  • 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


More About the History of PCTFE PCTFE was discovered in 1934 by Fritz Schoffer and Otto Scherer of IG Farben. The Kel-F® 81 grade of PCTFE was commercialized by the M.W. Kellogg Company in the early 1950’s, and subsequently acquired by the 3M Company in 1957. The 3M company discontinued production of Kel-F® in 1995 and sold the rights to Daikin® Industries, Ltd, who produces the resin today under the trade name Neoflon® M-400H.

What Standards is Neoflon PCTFE M-400H Manufactured to? ASTM D 1430-89 Type 1, Grade 2 ASTM D 1430-95 Type 1, Grade 3 ASTM D 1430-17 Group 1, Class 1, Grade 3 ASTM D 7211-13 (section 8.9) ASTM D 7194-12 (section 8.10) FDA compliant per 21 CFR177.1380 See Data Sheet For Complete Properties Table


What is Afton’s Experience with Neoflon PCTFE M-400H? Afton has been the largest processer of Neoflon PCTFE M-400H in the country for nearly 40 years.

PCTFE with Colorant

What are Afton’s Manufacturing Capabilities?

Glass-filled PCTFE
  • Compression-molded sheets up to 6” x 6” in 1/32” thickness and up to 12” x 12” in 1/16” thickness

  • Compression-molded sheets up to 24” x 24” in thicknesses from 1/8” to 2-¾”

  • Extruded rods from 1/8” to 2” diameter and spooled extruded rods from .022” to .100” diameter.

  • Compression-molded rods from 2-1/4” to 2-3/4” diameter.

  • Custom-sized rigid tubes – specify inner and outer dimensions

  • Special-processed optically clear sheets in 1/32” to 1/16” thicknesses for sight glass applications

  • Colorant addition to extruded rods for color-coding purposes

  • Glass-fiber addition to extruded rods and/or compression-molded rods and tubes for strength


What if My Application Requires Traceability and Quality Documentation? Afton has implemented a strictly-controlled quality process and generates a certification that is sent with each piece of Neoflon PCTFE M-400H ordered.

For more information on PCTFE, please visit our website Call (800)-344-7499 for price and availability today.


Featured Posts
Recent Posts
Search By Tags
bottom of page