PUR Adhesive Bitumen Washer: Introduction
PUR Adhesive plays a critical role in construction hardware applications—especially when paired with essential components like the Bitumen Washer. This small but vital part ensures waterproofing, vibration resistance, and longevity in roofing, cladding, and exterior fixings. In this comprehensive guide, you’ll learn about its manufacturing, applications, qualities, and why Midland Hardware LLC in Sharjah is your trusted supplier.
1. What Is a Bitumen Washer?
The Bitumen Washer is a sealing washer designed to work in conjunction with screws and bolts. It features:
- A metal core (typically steel or stainless steel) for strength.
- A bonded layer of bitumen, adhered using PUR Adhesive.
- An over-molded rubber or polymer outer seal.
Its primary functions in construction and hardware export contexts include:
- Waterproof sealing in roofing and metal cladding.
- Cushioning against vibration and thermal expansion.
- Protecting bolt heads from moisture ingress and corrosion.
2. Manufacturing & Composition
Metal Disc & Surface Prep
A steel or stainless disc is cut to size with clean edges. Before bonding, surfaces are pre-treated to increase adhesion.
PUR Adhesive Layer
PUR Adhesive (polyurethane-based) is applied between the metal core and the bitumen under calibrated heat and pressure. This bonding ensures the bitumen does not separate due to UV exposure, temperature shifts, or mechanical stress.
Bitumen Layer & Over-Mold
Once bonded, a controlled thickness of high-grade bitumen is applied. Finally, a rubber (EPDM or neoprene) over-mold or polymer seal covers the washer—providing elasticity and a tight seal.
Quality Control
Each batch is tested for adhesion strength, compression set (seal durability), UV resistance, and thermal performance—ensuring export clients receive consistent, high-grade parts.
3. Uses in Construction & Hardware Context
- Roofing & Metal Decking: These washers are essential when fixing panels to steel frames, sealing screw heads from water entry.
- Facade & Cladding Systems: Prevent water intrusion behind façade panels or sandwich boards.
- HVAC & Outdoor Anchoring: Provide corrosion protection where screws penetrate cladding to support pipes or ductwork.
For wholesale hardware shopkeepers and exporters: Bitumen Washers are high-demand items in orders for coastal, humid, or high-UV environments, where sealing reliability is critical.
4. Key Qualities & Benefits
Waterproof Performance
The bonded bitumen and polymer seal prevent moisture ingress where screws penetrate, especially on corrugated profiles or flat roof systems.
Vibration & Expansion Resistance
By using elastomeric backing, the washer allows minor movement without compromising the seal—a must in metal roof systems or building envelopes.
Durability in Harsh Climates
Thanks to PUR Adhesive, the washer retains integrity under UAE’s high temperatures and humidity—important for export markets in Africa or South Asia.
Ease of Use
These washers fit standard screw sizes and can be stocked in multiple dimensions. Installation is fast: tighten screw, washer flattens, seal compresses.
5. Midland Hardware LLC: Your Trusted Supplier
Midland Hardware LLC in Sharjah has decades of experience in hardware, tools, and fasteners, and offers competitive wholesale pricing and a wide-ranging inventory. They specialize in:
- Hand Tools
- Workshop Tools
- Machine Tools
- Cutting Tools
And fasteners including washers tailored for roofing and industrial use. Trust in decades of stock integrity, quality from global suppliers, and exceptional customer support. omanyellowpagesonline.com+1africayellowpagesonline.com+1
Verified Contact Details:
- Location: Industrial Area 2, First Industrial Street, Sharjah, UAE
- Phone: +971 6 532 1910 and +971 50 628 8752 atninfo.comreachuae.com+1atninfo.com+1
They do not manufacture, but supply hardware in large volume—perfect for retailers and export buyers focusing on fasteners like Bitumen Washers.
6. How to Promote and Stock the Bitumen Washer
Retail Positioning
Describe the Bitumen Washer as essential for leak-proof fixing in roofing and façade systems. Emphasize “sealed with PUR Adhesive for waterproof performance in UAE climate.”
Export Messaging
Highlight reliability in export packaging: stable under shipping stress, corrosion-resistant, and aligned with global quality standards. Include size options but lead with the feature—bitumen seal and adhesive bonding.
Sample Packs & Bundle Offers
Offer sample packs with several sizes for product trials by contractors. Bundle with fasteners and screws to upsell or support single-order convenience.
7. Mistakes to Avoid & Best Practices
- Mistake: Stocking washers without verifying adhesive bonds.
Solution: Request QC certificates or sample tear tests confirming PUR Adhesive bonding strength. - Mistake: Selling generic washers lacking proper bitumen backing or polymer top-seal.
Solution: Always specify bonded vs. loose bitumen washers. - Mistake: Ignoring sizing standards.
Solution: Keep clear charts matching washer inner diameter to screw size (e.g. M6, M8). Offer sizes commonly used in UAE sheet-metal roofing.
8. Export Readiness & Logistics
Midland Hardware’s location in Sharjah Industrial Area provides excellent access to UAE logistics channels. For export orders:
- Export cartons can include labelled size, material grade (e.g. stainless or mild steel), and washer standards.
- Fast dispatch to Jebel Ali or Port Khalid for sea freight or air shipments.
- Suitable packaging and documentation streamline bulk export compliance.
9. External Resource for Technical Standards
For standards on sealing washers and bitumen membranes, refer to the BS EN 15873 / ISO 9001 guidelines on waterproof screw assemblies—a useful reference for technical buyers. For more, see this external overview of European sealing pack standards. [ISO 9001 Bitumen Washer Guidelines] (external link for reference)
10. Final Thoughts
This Bitumen Washer, bonded with PUR Adhesive, may seem like a small hardware component—but its role is critical in guaranteeing water-tightness, durability, and satisfaction in construction and roofing applications.
For hardware retailers and export-focused suppliers, stocking trustworthy Bitumen Washers through Midland Hardware LLC, leveraging their local presence in Sharjah and reputation backing fastener quality, offers a reliable path for growth. Emphasize the adhesive-bonded seal, competitive pricing, and tested durability to meet buyer expectations.
By making this small part a featured product of the day in your marketing or export catalogue, you demonstrate industry knowledge and attention to detail—position your business as an expert resource in hardware and fasteners.
Also read – Adhesive Strength Test: Which Construction Glue Holds Fastest?