Fluorosilicone / FVMQ

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


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
Standard Color(s)
ISO/DIN 1629 Designation
Hardness Range
40-85 Shore A
ASTM D2000 / SAE J 200 Codes
Relative Cost

Service Temperatures

Standard Low Temperature
-60°C / -76°F
Special Compound Low Temperature
-65°C / -85°F
Standard High Temperature
177°C / 350°F
Special Compound High Temperature
232°C / 499°F

Performs Well In...

  • Fuels
  • Aromatic mineral oils
  • Benzene, Toluene
  • Ozone and weather

Doesn’t Perform Well In...

  • Brake fluids
  • Ketones
  • hydrazine