Parker Perfluoroelastomer (Ultra™) O-Rings

Parker Parofluor™ Perfluoroelastomer (FFKM) O-Ring Material Description:

Parker perfluoroelastomer (FFKM) currently offers the highest operating temperature range, the most comprehensive chemical compatibility, and the lowest off-gassing and extractable levels of any rubber material. Parker's proprietary formulations deliver an extreme performance spectrum that make them ideal for use in critical applications like semiconductor chip manufacturing, jet engines and chemical processing equipment.

Perfluoroelastomer is a rubber version of PTFE. Available from Parker under the tradenames Parofluor™ and Parofluor ULTRA™.

Parker O-Ring Distributor

For over 50 years, Engineered Seal Products has partnered with Parker Seals. ESP is proud to be one of the FEW Premier Distributors to qualify as a "Parker Seal Technology Center (STC)".

What does Parker STC mean?

  • Proven Engineering Capability
  • Expert Material & Technical Support
  • ISO Quality Approval
  • Strong Financial Track Record
Parker Parofluor™ (FFKM) Chemical Resistance:
  • Aliphatic and aromatic hydrocarbons.
  • Chlorinated hydrocarbons.
  • Polar solvents (ketones, esters, ethers).
  • Inorganic and organic acids.
  • Water and steam.
  • High vacuum with minimal loss in weight.
Parker Parofluor™ (FFKM) Not Compatible With:
  • Fluorinated refrigerants (R11, 12, 13, 113, 114, etc.)
  • Perfluorinated lubricants (PFPE)

Parker Parofluor™ (FFKM) O-Ring Compound Numbering System:

Parker has one types of nomenclature used to reference Parofluor™ (FFKM) products.

Polymer Code (Single Letter)
Special Property Description (Single Letter)
Sequence Number (Three Digits)
Durometer Indicator (Two Digits)

Special Property Descriptions:

General Purpose
Low Compression Set
Ethylene Acrylate or (Vamac®)
Fuel Resistant or Fully Fluorinated
Higher Fluorine Content
NSF/FDA/WRAS Approvals
Internally Lubed
Mil/AMS Specifications
Low Temperature Flexible
Non-Black Compound

Parker Parofluor™ (FFKM) O-Ring O-Ring Compounds:

Parker Compound Number Datasheet Hardness (Shore A) Low Temp High Temp Color Recommended For
FF354-65 PDF 65 +- 5 5 608 White Low Closure Force
FF102-75 PDF 75 +- 5 5 525 Black Acid Resistant, General Purpose
FF156-75 PDF 75 +- 5 5 527 Black General Purpose
FF158-90 PDF 90 +- 5 5 527 Black General Purpose, Extrusion Resistant
FF196-90 PDF 90 +- 5 -10 527 Black Low Temp., RGD Resistant
FF200-75 PDF 75 +- 5 5 608 Black Low Comp Set, AMS7257, FDA
FF302-75 PDF 75 +- 5 5 608 Brown Etch Resistant, Low Metal Ions
FF350-75 PDF 75 +- 5 5 608 White Plasma, High Purity, FDA, USP Class VI
FF352-75 PDF 75 +- 5 5 608 White General Purpose, Etch Resistant
FF370-75 PDF 75 +- 5 5 608 Black Low Particle Generation, Low Metal Ions
FF500-75 PDF 75 +- 5 5 550 Black Broad Chemical Resistance, FDA
FF580-75 PDF 75 +- 5 5 525 Black Steam Resistant, Amine/Base Resistant
V8545-75 PDF 75 +- 5 5 572 Black FDA, General Purpose
FF400-80 PDF 85 +- 5 -85 550 Black Low Temp., RGD Resistant
FF202-90 90 +- 5 5 608 Black Low Compression Set, Extrusion Resistant
FF582-90 PDF 90 +- 5 5 525 Black Steam Resistant, Amine/Base Resistant
V8581-90 PDF 90 +- 5 5 550 White Plasma Etch Resistant, Low Stiction

ASTM Designation
Shelf Life
25 Years
Hardness (Shore A) Range
65 - 90

Temperature ranges will apply to the majority of media for which the material is potentially recommended. With some media however, the service temperature range may be significantly different. ALWAYS TEST UNDER ACUTAL SERVICE CONDITIONS.

ESP’s shelf life recommendation is based on the ARP 5316 standard and intended to be utilized by those organizations who do not already have specific recommendations for the control of elastomeric seals. It should be noted that the packaging of the elastomeric seals prior to assembly into a product is an integral part of the controlled storage procedure. It provides a positive means of product identity from the time of manufacture, to the time of assembly.