Silicone Rubber Washers

Q: What temperature can silicone washers handle?

Continuous service from -85F to 400F - the widest range of any common washer material.

Q: What is the difference between silicone and rubber washers?

Silicone is a rubber; the real comparison is against organic rubbers like EPDM or neoprene. Silicone wins on temperature extremes and food compliance, while EPDM and neoprene are tougher and cheaper for ordinary water and weather duty.

Q: Can I use silicone washers outdoors?

Yes - silicone's UV and ozone resistance are excellent. Keep it away from oils and abrasion.

(1747 products)

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.