Premium EPDM Bonded Washers ， Heavy-Duty Waterproof Shingle Washers
In metal roofing, steel construction, and outdoor fastening applications, preventing moisture infiltration is critical to eliminating rust and structural failure. Our premium dome-shaped bonded sealing washers (waterproof washers) combine a high-grade metallic backing with a vulcanized EPDM rubber lining, creating a permanent, leak-proof seal that withstands extreme environmental stress.
Color Options & Material Specifications
To match your specific industrial requirements and fasteners, we manufacture these waterproof washers in two optimized rubber compounds:
Classic Black EPDM Washers:Infused with premium carbon black for maximum UV resistance and outdoor longevity. Ideal for standard industrial metal buildings, solar panel racking, and heavy-duty roofing screws.
Industrial Gray EPDM Washers: Specially formulated to prevent color-bleeding on light-colored or galvanized steel sheets. Perfect for architectural projects where aesthetics and invisible sealing are top priorities.
Key Advantages for B2B Importers & Distributors
Superior Ozone & UV Resistance:Unlike cheap PVC or commercial rubber that cracks within years, our pure EPDM layer remains flexible from -40°C to 120°C, ensuring a lifespan that matches the metal panels.
Perfect Concave (Dome) Design:The umbrella/cup shape perfectly channels the clamping force of hex head roofing screws, compressing the rubber evenly into the drill hole without squeezing it out or tearing the edges.
Galvanic Corrosion Prevention: The EPDM barrier acts as an electrical insulator between mismatched metals, preventing premature rusting around the fastening point.
Custom Wholesale & OEM Factory Capabilities
As a leading hardware fastener manufacturer, we support high-volume supply chains with tailored B2B options:
Flexible Metal Backing: Available in Galvanized Steel (Zinc Plated), Stainless Steel (SUS 304 / 316), and Aluminum to fit various anti-corrosion grades.
Custom Dimensions: Outer diameters ranging from 11mm to 25mm, perfectly matching standard self-drilling and self-tapping screws.
Bulk Packaging: Industrial bulk cartons, woven bags, or small branded plastic bags designed for retail distribution.
Ensure 100% leak-proof reliability for your fastening projects. Contact our sales team today for bulk price sheets, exact dimensional blueprints, or free samples for quality testing.
