Fluorosilicone Rubber (FVMQ)

Fluorosilicone is like silicone rubber, bonding trifluoropropyl, methyl, and vinyl as side chains. The mechanical and physical properties are similar to VMQ. However, FVMQ offers improved fuel and mineral oil resistance, but poorer hot air resistance then standard VMQ.

Cure system - Peroxide-Cured

Standard FVMQ compounds are peroxide-cured.

Other Common Variations

FVMQ offers excellent low-temperature flexibility and good resistance to fuel and aromatic mineral oil. It is usually applied in contact with jet and automotive fuels, most solvents, and engine oil especially in aerospace industry.
FVMQ compounds meet MIL-R-25988 specification.


General Information

ASTM D 1418 Designation: FVMQ
ISO/DIN 1629 Designation: FVMQ
ASTM D2000 / SAE J 200 Codes: FK
Standard Color(s): Blue
Hardness Range: 40 to 85 Shore A
Relative Cost: High


Service Temperatures

Standard Low Temperature: -60°C / -76°F
Standard High Temperature: 177°C / 350°F
Special Compound Low Temperature: -65°C / -85°F
Special Compound High Temperature: 232°C / 450°F

Performs Well In...

Doesn't Perform Well In...

  • Fuels
  • Aromatic mineral oils
  • Benzene, Toluene
  • Ozone and weather
  • Brake fluids
  • Ketones
  • Hydrazine