Parker Silicone (VMQ) O-Rings

Parker Silicone (VMQ) O-Ring Material Description:

Silicones have good ozone and weather resistance as well as good insulating and physiologically neutral properties. However, silicone elastomers as a group, have relatively low tensile strength, poor tear strength and little wear resistance.

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 (VMQ) Chemical Resistance:
  • Animal and vegetable oil and grease.
  • High molecular weight chlorinated aromatic hydrocarbons (including flame-resistant insulators, and coolant for transformers).
  • Moderate water resistance.
  • Diluted salt solutions.
  • Ozone, aging and weather
Parker (VMQ) Not Compatible With:
  • Superheated water steam over 121°C (250°F).
  • Acids and alkalis.
  • Low molecular weight chlorinated hydrocarbons (trichloroethylene).
  • Hydrocarbon based fuels.
  • Aromatic hydrocarbons (benzene, toluene).
  • Low molecular weight silicone oils.

Parker Silicone (VMQ) O-Ring Compound Numbering System:

Parker has two types of nomenclature used to reference Silicone (VMQ) products.

Polymer Code (Single Letter)
Sequence Number (Four Digits)
Durometer Indicator (Two Digits)

- OR -

Polymer Code (Single Letter)
Special Property Description (Single Letter)
Sequence Number (Three Letters)
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 Silicone (VMQ) O-Ring Compounds:

Parker Compound Number Datasheet Hardness (Shore A) Low Temp High Temp Color Recommended For
S0469-40 PDF 40 +- 5 -75 400 Rust AMS 3301, USP Class VI, A-A-59588 CL2a, 2b, GR 40
S0802-40 PDF 40 +- 5 -60 400 White FDA
S0595-50 PDF 50 +- 5 -70 400 Rust AMS 3302
S0899-50 PDF 50 +- 5 -103 400 Rust ZZ-R-765 CL 1a, 1b, 2a, 2b GR 50
SA150-50 50 +- 5 -65 400 Trans Low Organic Extractibles
S0317-60 PDF 60 +- 5 -103 450 Rust FDA, USDA, USP CL VI
S0613-60 PDF 60 +- 5 -60 450 Rust ZZ-R-765 Cl 2b, Gr 60, AMS 3303
S0383-70 PDF 70 +- 5 -175 400 Rust A-A-59588 CL 1a, 1b, GR 70, AMS 3337
S0455-70 PDF 70 +- 5 -65 450/500 Rust High Temperature
S0604-70 PDF 70 +- 5 -65 450 Rust ZZ-R-765 Cl 2a, 2b, Gr 70, AMS 3304, AMS 3357, MIL-G-21569 Class 2
S1138-70 PDF 70 +- 5 -60 400 Rust FDA, USP Class VI, USP <87>
S1224-70 PDF 70 +- 5 -65 450 Rust A-A-59588 Cl 2a, 2b, Gr 70, AMS 3357, MIL-G-21569 Class 2, AMS 3304
SM355-75 PDF 75 +- 5 -60 450 Rust AMS 7267, FDA, USP Class VI, USP <87>
S0614-80 PDF 80 +- 5 -65 450 Rust A-A-59588 CL 2a, 2b, GR 80, AMS 3305

ASTM Designation
Shelf Life
25 Years
Hardness (Shore A) Range
40 - 80

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.