Rubber Washers.
Cannon Gasket has run rubber washer programs since 1971. ISO 9001 quality systems, in-house tooling, JIT/VMI/Kanban replenishment. Send OD, ID, thickness, durometer, and annual volume. We reply with pricing, tooling cost, and lead time.
Quick facts about Rubber Washers
- Rubber washers seal, cushion, insulate, and space fasteners where a flat elastomeric interface has to spread load and block fluid at the same time.
- Plumbing fixtures, HVAC equipment, automotive assemblies, irrigation lines, pool and spa gear, and medical devices all run rubber washers.
- Stock options include EPDM, Neoprene, Silicone, Nitrile, Viton, SBR, fluorosilicone, and FDA/USP Class VI grades.
Get pricing
Request a quote for custom rubber washers.
Rubber Washer Materials
Ten elastomers for every sealing environment.
All rubber washers are precision die-cut from elastomeric materials, with every major compound stocked in-house. The right material depends on the project, the temperatures the washer is exposed to, and the longevity expected from the part. Unlike a metal washer, a rubber washer accommodates difficult spaces and adds a sealing benefit that helps weather-proof the assembly. We hold +-.001 on critical dimensions, run short and long production volumes, and laminate pressure sensitive adhesive on one or both sides in-house. MIL spec material and custom compounds are available on request.
EPDM
Outstanding weather, ozone, UV, and water resistance. Ideal for outdoor and potable water use.
Learn more →Neoprene
Balanced chemical, oil, and weather resistance. A reliable all-purpose sealing washer.
Learn more →Silicone
Wide -80°F to +450°F service range with excellent dielectric strength and FDA-grade options.
Learn more →Buna-N / Nitrile
Excellent resistance to petroleum oils, fuels, and hydraulic fluids for oil-contact sealing.
Learn more →Viton®
Premier high-temperature, chemical-resistant fluoroelastomer for aggressive fluids and heat.
Learn more →Fluorosilicone
Silicone performance with fuel and oil resistance. Built for aerospace and demanding fluid systems.
Learn more →FDA / Medical Grade
Compliant FDA-grade compounds for food, beverage, pharmaceutical, and medical device sealing.
Learn more →Polyurethane
Exceptional abrasion and tear resistance for high-wear sealing and bumper applications.
Learn more →Urethane
Tough, wear-resistant urethane washers for demanding mechanical and load-bearing service.
Learn more →Polyisoprene
Latex-free synthetic natural rubber with outstanding resilience and abrasion resistance for automotive, healthcare, and sporting goods.
Learn more →SBR
Cost-effective general-purpose rubber with good abrasion resistance for commercial sealing.
Learn more →Sponge & Foam Washers
Sponge and foam washers for efficient sealing.
Alongside solid rubber washers, we offer sponge and foam washers that deliver the same stability and precision while sealing more efficiently to surrounding metals and other materials for a more durable, long-term solution. Available in open and closed cell sponge, soft, medium, and firm densities, and material blends, all with pressure sensitive adhesive on one or both sides.
Neoprene Sponge
Closed-cell neoprene sponge for compression sealing against dust, air, and moisture.
EPDM Sponge
Weather, ozone, and water-resistant sponge for outdoor gasket-washer service.
Buna-N / Nitrile Sponge
Oil-resistant sponge washers for fuel and hydraulic contact under light load.
Silicone Sponge
Wide-temperature silicone sponge for high-heat compression sealing.
Polyurethane
Tough, abrasion-resistant foam washers for cushioning and high-wear seating.
Polyethylene
Lightweight closed-cell foam for spacing, padding, and low-cost cushioning.
PORON®
Microcellular urethane foam that holds compression set for long-term gasketing.
Applications
Where rubber washers work.
Fastener Sealing
Bolt, screw, and stud sealing against weather and fluid ingress.
Vibration Damping
Isolating components and reducing mechanical noise transmission.
Compression Gaskets
Load-bearing seals under controlled compression in assemblies.
Spacers & Bumpers
Precision spacing, cushioning, and impact absorption between parts.
Weather Sealing
Outdoor equipment, solar, and roofing sealing against moisture and UV.
Electrical Isolation
Dielectric washers that isolate fasteners and reduce galvanic contact.
Industries Served
Trusted across regulated and industrial markets.
Frequently Asked Questions
Common questions about rubber washers.
Are you ISO 9001 certified?
Yes, ISO 9001:2015 certified. Documented quality management covers incoming material verification, in-process inspection, calibrated measurement, final inspection, non-conformance handling, corrective action, and full lot traceability. AS9100-ready for aerospace, with MIL-spec and FDA 21 CFR 177.2600 / USP Class VI grades available on request.
What OD / ID / thickness ranges are available?
Standard die-cut range: 0.125 inch to 12 inch OD, 0.060 inch to 10 inch ID, 0.030 inch to 0.500 inch thickness. Larger, smaller, or thicker parts quoted on request.
What durometer should I specify for a rubber washer?
Softer (40A Shore) seals better on rough or misaligned surfaces at lower bolt load. Harder (70-80A) handles higher bolt load without extruding. For most fastener sealing, 60-70A is the starting point.
Which compound holds up outdoors?
EPDM excels at weather, ozone, UV, water, and steam. Neoprene is more balanced if you also need oil resistance. Nitrile fails in outdoor service and should not be specified for UV-exposed parts.
Which compound resists oil and fuel?
Buna-N / Nitrile is the default for petroleum oils, fuels, hydraulic fluids, and most industrial chemicals at moderate temperatures. For aggressive chemicals or temperatures above 250°F, step up to Viton or Fluorosilicone.
How fast do you return a quote?
Most RFQs come back within one business day. Simple profile updates to an existing tool quote same-day. Send a drawing, DXF, or competing part number and our engineering team reviews material, tolerance, and volume before pricing.
What is the minimum order quantity?
Minimums depend on the part and material. We cut prototype and first-article quantities for engineering evaluation, then scale up to production volumes from the same tooling. For high-volume programs we run JIT, VMI, and Kanban replenishment out of Fontana, California.
What should I send with an RFQ?
Ideal: a drawing or DXF, material spec (or compound family), estimated annual volume, and any regulatory callouts (FDA, USP Class VI, AS9100, MIL-spec). If you only have a sample or a part number from a competing supplier, send that and we will reverse-engineer the spec before quoting.
What are typical lead times?
Prototype and first-article parts usually ship in 5-10 business days. Production runs from existing tooling are 2-3 weeks depending on volume and material lead time. Rush and expedite options available on a case-by-case basis.
Need custom rubber washers?
From prototype to production, any material, any volume.
ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971ISO 9001 CertifiedAS9100-ReadyMIL-Spec CompatibleFDA / USP Class VIEst. 1971