2025.07.05 Self-Drilling Screws with EPDM Sealing Washers for Superior Building Envelope Protection

In response to increasing global demand for water-resistant and corrosion-proof fastening systems, DD Fasteners, a trusted manufacturer of industrial and construction fasteners, proudly presents its Self-Drilling Screws with EPDM Bonded Sealing Washers, engineered for roofing, façade, and steel structure applications requiring both mechanical strength and environmental protection.

🔩 Product Overview
Product Name: Self-Drilling Screw with EPDM Sealing Washer

Material: Hardened Carbon Steel (C1022A), Stainless Steel (SUS 304, SUS 410, SUS 316 optional)

Head Type: Hex Head / Hex Flange Head

Thread Diameter: M4.8 / M5.5 / M6.3

Length Range: 19mm to 150mm (custom sizes available)

Drill Point Types: Standard #2 to Heavy Duty #5 Drill Points

Surface Treatment: Zinc-Plated, Ruspert®, Dacromet®, Zinc-Nickel Alloy, Mechanical Galvanized, Hot-Dip Galvanized

Washer Options: Pre-assembled with EPDM-bonded sealing washers (stainless steel, aluminum, or galvanized backing)

⚙️ Key Features & Performance Advantages
Integrated Sealing Function
Pre-assembled EPDM sealing washers provide a watertight barrier, ideal for external roofing and wall cladding applications. EPDM rubber offers exceptional resistance to UV, ozone, and temperature extremes.

High Drilling Efficiency
Precision-formed drill points (up to #5) enable quick and effortless penetration into steel substrates up to 12.5mm thick—eliminating the need for pre-drilling and reducing installation time.

Corrosion Resistance
With surface coatings like Ruspert® and Zinc-Nickel alloy, these screws are capable of passing salt spray tests of 1000–1500 hours, making them suitable for coastal, industrial, and high-humidity environments.

Secure Fastening and Load-Bearing Capacity
Deep threads and hardened core material deliver excellent pull-out strength and vibration resistance, ensuring reliable long-term performance even under dynamic load or weather exposure.

🏗️ Application Scenarios
DD Fasteners’ self-drilling screws with EPDM washers are widely used in:

Metal roofing and cladding systems

Pre-engineered steel buildings (PEB)

Solar panel mounting systems

HVAC duct fixing and panel overlaps

Construction in high-corrosion environments (coastal zones, industrial sites)

These screws are particularly advantageous where water penetration protection, long service life, and ease of installation are priorities.

🔧 OEM Support & Customization
DD Fasteners offers full OEM/ODM support, including custom head styles (hex, flange, pan), special surface treatments, washer materials, and packaging. All products comply with DIN, ISO, and IFI standards and are subject to stringent in-house and third-party quality testing.

🔗 Learn More
🛠 Now Available – 2025 Global Promotion Program!
Contact us for bulk discounts, OEM services, and technical consultations.

🌐 Website: www.ddfasteners.com
📧 Email: felixyung@ddfasteners.com
📱 WhatsApp: +852 68409292

DD Fasteners – Precision Where It Matters. Protection Where It Counts.
Your global partner in professional fastening solutions.