Fluorosilicone O-Rings & Gaskets | Seal & Design Inc.

Fluorosilicone O Rings

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Fluorosilicone Material Fluorosilicone rubber contains trifluoropropyl groups next to the methyl groups. The mechanical and physical properties are very similar to silicone rubber. However, fluorosilicone offers improved fuel and mineral oil resistance but poor hot air resistance when compared with silicone.

Both o-rings and gaskets can be made from Fluorosilicone materials.

Names: Fluorosilicone, FVMQ

Compound Info
ASTM D1418 Designation FVMQ
ASTM D2000/SAE J200 Type, Class FK
Hardness (Shore A) 40-80
Color blue
Thermal Properties
Min Temp. -100°F (-73°C)
Max Temp. 400°F (204°C)


Chemical Resistance
Chemical Resistance
Aromatic mineral oils (IRM 903 oil)
Not compatible
NOT compatible
Low molecular weight aromatic hydrocarbons (benzene, toluene)

Disclaimer: These are general guidelines only. All materials should be tested in your application.