The EPDM washer is a high-performance sealing solution crafted from premium EPDM (Ethylene Propylene Diene Monomer) rubber, often bonded to durable metals like stainless steel or carbon steel. This composite waterproof EPDM washer is engineered to create airtight, watertight, and weather-tight seals, making it indispensable for roofing, siding, plumbing, and industrial applications. With exceptional resistance to UV radiation, chemicals, and temperature extremes, our Donghuang anti-slip EPDM gasket delivers long-lasting sealing performance, preventing leaks, corrosion, and vibration-related damage.
Our EPDM washer excels in outdoor environments, withstanding UV radiation, ozone, and harsh weather conditions—ideal for roofing, siding, and outdoor fixtures that require year-round protection.
This waterproof EPDM gasket effectively seals out water, moisture, and a wide range of chemicals, making it perfect for plumbing systems, industrial pipelines, and marine applications.
EPDM rubber’s inherent toughness ensures the washer maintains its sealing integrity over time, resisting wear, tear, and degradation—reducing maintenance and replacement costs.
Even under compression, the anti-slip EPDM washer retains flexibility, conforming to irregular surfaces for a tight, gap-free seal that prevents leaks in non-uniform applications.
With a broad operating temperature range, this bonded sealing washer performs reliably in both hot and cold environments, from freezing winters to scorching summers.
EPDM’s non-conductive properties prevent galvanic corrosion and electrical shorts, making it a safe choice for electrical applications and metal-fastening projects.
Specification Category | Details |
Model Number | EPDM WASHER |
Spring Washer Type | Standard |
Material Composition | EPDM Rubber + Carbon Steel / Brass |
Color Options | Black or Grey |
Conductivity | Conductive or Nonconductive (Customizable) |
Surface Feature | Anti-Slip, Waterproof, Bonded Sealing |
Trademark | Donghuang |
Place of Origin | China |
Production Capacity | 300 Tons/Month |
Customizable Sizes | M4×M26 (Available per Request) |
Packaging | Pallet |
The EPDM washer is a versatile sealing solution for:
Roofing & Siding: Sealing sheet metal screws, preventing rain and wind penetration.
Plumbing & Piping: Creating watertight seals for pipes, fittings, and valves in residential and industrial plumbing.
Electrical Installations: Insulating electrical components to prevent galvanic corrosion and shorts.
Outdoor Fixtures: Weatherproofing outdoor lighting, signs, and HVAC ductwork.
Mechanical Equipment: Dampening vibrations in machinery, reducing noise and wear.
Automotive & Marine: Sealing components exposed to moisture, salt, and harsh chemicals.
Ensure the surface (metal, plastic, or concrete) is clean, dry, and free of oil, grease, or debris—contaminants can compromise the seal.
Position the EPDM washer directly over the bolt hole or sealing area, aligning it with the fastener to ensure full coverage.
For roofing or siding applications, trim the EPDM washer with PVC or compatible edge trims to create a finished, weatherproof edge.
Ensure the washer is perfectly aligned with the bolt or screw to avoid misplacement, which can lead to leaks.
Tighten the fastener to apply even compression across the washer—this maximizes sealing effectiveness without damaging the rubber.
Over-tightening can crack or deform the EPDM rubber, compromising the seal. Stop tightening once the washer is fully compressed.
Yes! We offer custom sizes (M4×M26), colors, and conductivity options (conductive/nonconductive) to meet your specific project needs.
Absolutely. Our weatherproof EPDM washer resists UV, ozone, and extreme weather, making it ideal for long-term outdoor use.
It resists most acids, alkalis, and common industrial chemicals—contact us for a detailed chemical resistance chart.
Nonconductive: For electrical applications to prevent shorts and galvanic corrosion.
Conductive: For projects requiring electrical continuity between fasteners and surfaces.
With proper installation, our EPDM washer offers a long service life (5×10 years, depending on environment) due to its resistance to degradation.
MOQ is flexible—contact our team for customized options based on your order volume (bulk discounts available for large orders).
We provide free samples for quality testing. Inquire with our sales team to request a sample of the bonded EPDM washer.
Standard delivery: 15×30 days after deposit confirmation. Expedited shipping is available for urgent orders.
30% deposit before production, 70% balance against shipping document copy.
Accepted payment methods: T/T, L/C.
Trade terms: FOB, CIF, CNF (negotiable).
Donghuang is a direct manufacturer with strict quality control processes:
100% inspection of finished EPDM washers to meet international standards (e.g., ISO) and customer requirements.
Full-process quality checks: Material sourcing (premium EPDM rubber, high-grade steel), bonding, and packaging.
Factory-direct pricing: No middlemen, ensuring competitive rates without sacrificing quality.
Customization expertise: We work closely with customers to develop tailored sealing solutions for unique applications.
