Shop Viton rubber washers in every OD, ID and thickness we stock. Viton offers superior chemical, fuel and high-temperature resistance — making it the go-to choice for chemical processing, aerospace, automotive and aggressive fluid environments. Rated for −15°F to 400°F. Fast shipping and bulk pricing on every order.
Not sure if Viton is right for your job? Read our Viton material guide for a full compound comparison, or compare all 7 washer materials side by side. New to washer sizing? See how to measure OD, ID & thickness.
Viton washer properties
| Property |
Rating |
| Temperature range |
−15°F to 400°F continuous — highest of any washer rubber we stock |
| Fuels (incl. ethanol blends) |
Excellent — the modern fuel-system standard |
| Oils, acids & solvents |
Excellent — handles chemistry that destroys other rubbers |
| UV / ozone / weather |
Excellent |
| Low-temperature flexibility |
Limited — stiffens below −15°F (nitrile flexes colder) |
| Typical hardness |
70–75 Shore A (durometer guide) |
When a Viton washer earns its price
Viton (FKM fluoroelastomer) is the premium answer when heat and chemistry stack up: fuel systems running ethanol blends, carburetor and injector hardware, hot oil service, chemical transfer, solvents, and engine-bay fasteners that bake at temperatures nitrile can’t hold. Where nitrile hardens and cracks after seasons of heat cycling, Viton keeps sealing for years — the full head-to-head is in Buna vs Viton. For plain water and weather duty, EPDM does the job at a fraction of the cost; save Viton for where it’s genuinely needed.
Bulk Viton washers
Every size in this collection carries automatic volume pricing, and larger or mixed-size runs can be quoted through our bulk & wholesale program.
Viton washer FAQ
Viton vs nitrile — which do I need?
Nitrile handles ordinary petroleum at ordinary temperatures for less money; Viton takes over for ethanol-blended fuels, aggressive chemicals and sustained heat past 250°F.
Are Viton washers fuel resistant?
Yes — including modern E15/E85 ethanol blends that swell nitrile. That’s why late-model fuel systems spec FKM.
What temperature can Viton washers handle?
Continuous service to 400°F with short excursions higher — the highest rating of any washer rubber we stock.
Is Viton worth the extra cost?
When fuel, chemicals or heat are present, yes — one Viton washer outlasts repeated replacements of cheaper compounds. For plain water and weather, EPDM is the economical pick.
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