Product Overview
Durable EPDM Rubber Roofing Washers (often referred to as Bonded Washers) are essential sealing components for the modern construction and metal roofing industries. These washers are designed to create a permanent, weatherproof seal around screws and fasteners, preventing water ingress and protecting structural integrity from the elements.
At Xiamen Best Seal, we utilize premium EPDM rubber specifically formulated for high UV and ozone resistance. This material is permanently bonded to a metal backing-typically galvanized steel, stainless steel, or aluminum-to ensure even pressure distribution and long-term elasticity. Whether you are installing solar panels, metal roofing sheets, or industrial HVAC systems, our roofing washers provide a reliable barrier against leakage, vibrations, and galvanic corrosion.
Structure & Cross-Section
Precision Bonded Bi-Material DesignThe structure of our roofing washers consists of a convex metal cap and a concave EPDM rubber base. This unique geometry allows the rubber to slightly "flow" and fill the gap around the fastener shank as torque is applied, creating a multi-point seal that stops water from following the screw thread. The permanent vulcanization process ensures that the metal and rubber never separate, maintaining a consistent air-tight and water-tight barrier even under extreme wind loads and thermal expansion of roofing materials. |
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Material Selection
1. The Power of EPDM Sealing
| Property | Standard Benchmark | Benefit for Roofing |
|---|---|---|
| UV & Ozone Resistance | Excellent (No cracking) | Ensures 15-20+ years of life in direct sunlight. |
| Temperature Range | -40°C to +120°C | Retains flexibility in freezing winters and scorching summers. |
| Elongation | >125% | Adapts to fastener movement during thermal expansion. |
| Hardness | 60–75 Shore A | Ideal balance between sealability and torque support. |
2. Metal Backing Variety
- ˚ ✵ Galvanized Steel (G-90) for general use
- ˚ ✵ Stainless Steel (304/316) for coastal areas
- ˚ ✵ Aluminum for lightweight roof panels
- ˚ ✵ Color-coated metal to match roofing sheets
3. Functional Customization
- ˚ ✵ Anti-Static compounds for solar mounts
- ˚ ✵ High-recovery rubber to handle roof vibration
- ˚ ✵ Custom thickness for extreme pressure
- ˚ ✵ Sulfur-free EPDM (prevents runoff pollution)
Product Advantages
⚝₊ Why Choose Our Sealing Solutions ⊹˚
- Permanent Weatherproofing – High-density EPDM effectively blocks water for decades.
- Vibration Damping – Absorbs acoustic noise and mechanical stress from high winds.
- Anti-Corrosion Barrier – Prevents galvanic corrosion by separating dissimilar metals.
- Load Distribution – Protects the coating of the roofing sheet from screw-head abrasion.
- Tight Bonding Tech – Vulcanized rubber won't spin or detach during fast installation.
⚝₊ Xiamen Best Seal Manufacturing Strength ⊹˚
- High-Speed Production – Automated vulcanization lines for millions of units per month.
- Material Lab – In-house UV aging tests and salt spray testing for metal backings.
- Custom Tooling – Tailored washer sizes for non-standard screw gauges.
- B2B Global Supply – Trusted supplier for roofing contractors and fastener distributors.
Product Applications
Versatile Protection for Exterior FastenersOur bonded roofing washers are the standard choice for corrugated metal roofing, solar panel mounting brackets, and pre-engineered metal buildings (PEMB). They are also widely used in automotive assemblies, HVAC ductwork, and industrial machinery where vibration and water ingress are major concerns. By combining the strength of metal with the resilience of EPDM, these washers provide a "fit-and-forget" solution for any high-exposure fastening application. |
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Installation Guide
🛠️ Technical Tips for a Perfect Seal
Always place the rubber side facing the roofing sheet. The metal cap should face the screw head.
Drive the fastener until the rubber slightly bulges out. Do not over-torque to the point of distorting the metal cap.
Ensure the roofing sheet is clean and free of metal burrs around the hole for maximum surface contact.
Maintain a 90-degree angle between the screw and the roof surface to ensure even compression.
Packaging & Shipping
📦 Industrial Bulk Distribution
| Packaging Type | Details |
|---|---|
| Canvas/Poly Bags | 1,000 to 5,000 pcs per bag (depends on size); Bulk quantities for construction sites. |
| Outer Carton | Standard export grade with 25kg weight limit for safe handling. |
| Custom Kits | Washers can be supplied pre-assembled with screws or in contractor-sized "job kits." |
| Export Hub: Efficient shipping from Xiamen Port to major international destinations. | |
Certificates & Compliance
🏆 Quality System: ISO 9001:2015 Registered Facility
⚙️ Industrial Compliance: RoHS 2.0, REACH, ASTM D2000 Material Specs, Salt Spray Testing (for metal part)
⟡ ݁₊ ݁.FAQ – Request For Quotation
❓ Can I use these washers in coastal environments?
For coastal or high-salinity areas, we strictly recommend our Stainless Steel 316 Bonded Washers. These offer the highest resistance to both UV (via EPDM) and salt-air corrosion (via the metal cap).
❓ What is the expected lifespan of the EPDM component?
When properly installed, our premium EPDM washers are designed to match the lifespan of the metal roofing sheet, typically lasting 15 to 25 years without significant hardening or cracking.
❓ Do you provide custom colored washers?
Yes. We can supply painters or powder-coated metal caps to match any standard roofing color (RAL or Pantone) while maintaining the original EPDM sealing integrity underneath.
.݁₊ ⊹ .݁ Related Products⟡ ݁ .⊹ ₊ ́.
Why choose us?
- Our Rubber Washers are manufactured to meet the highest quality standards, ensuring customer satisfaction and retention.
- For new employees, our company will conduct different skills and culture training according to the characteristics of the position.
- We provide comprehensive testing and inspection reports for our Rubber Washers to ensure compliance with industry standards.
- 'Quality first, technology first, innovation and pragmatic, integrity management' is our company's business philosophy.
- Our Rubber Washers are designed to be durable, reliable, and long-lasting.
- Meanwhile, our organization staffs a group of experts devoted into the growth of Rubber Roofing Washers.
- Our Rubber Washers are available in different colors and finishes to match specific design requirements.
- The quality of our Rubber Roofing Washers and services are much higher than those of our peers. With the continuous support of customers, the company's sales volume continues to rise.
- Our Rubber Washers are designed to reduce noise levels and vibration in machinery and equipment.
- Culture is the growing source of an enterprise. In the course of enterprise development, we always put the improvement of internal staff's creative environment in the first place.
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