Fluorosilicone (FVMQ) adds fluorocarbon side groups to the silicone (VMQ) backbone, closing standard silicone's biggest gap: fuel and mineral oil resistance. It keeps VMQ's wide temperature range and good compression set behavior while tolerating hydrocarbon exposure that would swell plain silicone — at a cost premium over VMQ, and still without VMQ's food/medical certification pathway in most grades.
| Temperature range | -60°C to +200°C |
|---|---|
| Hardness range | 70 Shore A |
| Relative cost | $$$ |
| Resists | Fuels, mineral oils, wide temperature range (extreme heat and cold) |
| Avoid with | Aromatic/chlorinated solvents, brake fluid, steam under pressure, high abrasion duty |
| Standards | AS568 / ISO 3601 / BS 4518 |
Fluorosilicone isn't a single formulation — the grade below matters as much as the base compound once your application gets specific.
FITCO's standard fluorosilicone grade — the default unless a project specifies a different hardness or cure system.
Not sure which sub-grade fits your application? Send us your fluid, temperature and pressure and our engineers will confirm — send an enquiry →
Physical property data — hardness, tensile strength, elongation, compression set and temperature resistance — tested to ASTM/ISO standards for each hardness grade FITCO stocks.
Full physical property data sheet — hardness, tensile strength, elongation at break, compression set and temperature resistance.
Download Datasheet →General-purpose seal for mineral oils, fuels and hydraulic fluids.
-20°C to +200°CHigh-temperature, chemical-resistant sealing for oil & gas and process industries.
-15°C to +327°CNear-universal chemical resistance for the most demanding process seals.
Send us your fluid, temperature and pressure — our engineers will confirm the compound.
