Aflas® o-rings provide excellent chemical, heat and steam resistance. Aflas o-rings® are typically used instead of FKM for improved resistance to bases, amines, sour gasses, H2S steam, and radiation. Aflas® o-rings are most often used in oil exploration, biotechnology and pharmaceutical industries due to the unique performance features.

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Service Temperature Range
Low Temp. Range, °F Abbv. High Temp. Range, °F Compr. Set Oils Steam Weather/
Fuels Acids/
Bases Abrasion Wear Permeation
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  • Excellent
  • Moderate
  • Poor
  • Specialty Compounds Only


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Popular Allorings Compounds
Compound Relative
Low Temp ° F High Temp ° F Durometer Color Special
View Datasheet Relative Price: 4 Relative Availability: 2 15  450  80  Black 
General purpose, commodity grade compound. 
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Common Names:

TFE/P Rubber, Aflas®

General Description:

TFE/P Rubber exhibit excellent chemical, heat and steam resistance. They provide superior performance in water, steam and virtually all caustics making them ideal for pharmaceutical and biotechnology manufacturers that use steam and caustic chemicals in the sterilization process. TFE/P provides excellent performance in SIP (steam in place), CIP (clean in place) and WFI (water for injection) applications. TFE/P is widely used in the oil exploration and drilling industry due to its excellent steam and H2S resistance.


  • Excellent steam and caustic resistance up to 400° F (204° C)
  • Resistant to acids, bases and highly reactive organic and inorganic chemicals
  • Amines and H2S resistance
  • Ozone resistance
  • Radiation resistance up to 200 MRad of gamma-ray radiation
  • Excellent volume resistivity (greater than 1016Ω cm)


  • Aromatic Fuels
  • Ketones
  • Carbon tetrachloride
  • Chlorinated Hydrocarbons
  • Organic Refrigerants

Service Temperature:

-5° to 232° C (23° to 450° F)