Shop silicone rubber washers in every OD, ID and thickness we stock. Silicone is extreme temperature range and FDA-compliant grades available — making it the go-to choice for food processing, medical equipment, high-heat appliances and electronics. Rated for −85°F to 400°F. Fast shipping and bulk pricing on every order.
Not sure if Silicone is right for your job? Read our Silicone 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, then shop the full catalog.
Popular Silicone uses: food-grade, electrical & electronics and HVAC.
Silicone washer properties
| Property |
Rating |
| Temperature range |
−85°F to 400°F — widest of any washer rubber |
| Food contact |
FDA-compliant grades (CFR 177.2600) |
| UV / ozone resistance |
Excellent |
| Electrical insulation |
Excellent |
| Oil & fuel resistance |
Poor — use nitrile or Viton |
| Tear resistance |
Lower than other rubbers — protect from sharp edges |
| Typical hardness |
50–60 Shore A, stays soft across its range (durometer guide) |
When a silicone washer is the right call
Pick a silicone washer when temperature or purity rules the application: espresso machines and coffee equipment, ovens, dishwashers and steam appliances, heat lamps and lighting, sub-zero freezer hardware, medical devices, and food and beverage equipment where FDA compliance matters. Silicone also stays flexible at −85°F where every other rubber has gone rigid. Its trade-offs: it's softer and tears more easily than nitrile or EPDM, and petroleum oils degrade it — for hot oily service, Viton is the answer.
Silicone washer FAQ
Are silicone washers food safe?
FDA-compliant silicone grades are the standard for food-contact washers. If your application requires certified food-grade material, contact us to confirm grade documentation before ordering.
What temperature can silicone washers handle?
Continuous service from −85°F to 400°F — the widest range of any common washer material, and why silicone owns appliance and high-heat duty.
Silicone vs rubber washers — what's the difference?
Silicone is a rubber; the comparison people mean is silicone vs organic rubbers like EPDM or neoprene. Silicone wins on temperature extremes and food compliance; EPDM and neoprene are tougher and cheaper for ordinary water and weather duty.
Can I use silicone washers outdoors?
Yes — UV and ozone resistance are excellent. Just keep them away from oils and protect them from abrasion.
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