BDN Fasteners
Q&A
DEKS Blue Line EPDM Washer Installation Guide
DEKS Blue Line EPDM Washer Installation Guide 
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BUILDING IT RIGHT TO MAKE IT WATERTIGHT
DEKS Blue Line EPDM provide an excellent waterproof seal— even under the most severe weather conditions— if properly installed.
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The trick is not to overdrive or underdrive the screws.
If the screw is not tightened enough, moisture leaks around the washer. An overtightened screw squishes the washer too thin, which can also result in leaks.
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Important Tip:
Replace worn sockets immediately if they cause the screw to wobble during installation. Crookedly driven screws can cause water leaks.
True Australian Standard-AS3566
The BDN Comparison-AS3566
BDN FASTENERS
True Australian Standard-AS3566
Washer Diameter=13.97-14.78mm
Scratshank
SCRATSHANK
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Cutting / Break out the metal filings
Remain free of damage to sealing washer during installation – Weatherseal
Self-Drilling Screw V.S. Self-Tapping Screw
Self-Drilling Screw V.S. Self-Tapping Screw
BDN FASTENERS
- Self-Drilling Screw – Steel Sheet / Steel Purlins
Thunder-Shot Point 
✔ Improved Drill Performance
✔ Time Saving
- Self-Tapping Screw – Timber
Type 17 Sharp Point
✔ Reduce Splitting
DEKS Dekseal® Trueblue® 100% Leak proof sealing
DEKS Dekseal® Trueblue® 100% Leak proof sealing
BN3 Series
Silver Grey / SST1000hrs / 7 Cycles
✔ DEKS Dekseal® Trueblue® Fluted Weatherseal Washers
✔ BDN Fasteners, 100% Made In Taiwan
Dual-Tite X DEKS Dekseal® Trueblue® 100% Weather Sealed
Dual-Tite X DEKS Dekseal® Trueblue® 100% Weather Sealed
✔ DEKS Dekseal® Trueblue® Fluted Weatherseal washers
✔ BDN Fasteners, 100% Made In Taiwan
Double Scratshank: Swarf Free
Double Scratshank: Swarf Free
Removes sealing washer damaging swarf during installation.
Harpoon Thread: Anti-stripping, roof fixing threads
Harpoon Thread: Anti-stripping, roof fixing threads
Dual-Tite (Roofing Screw Duofix 2 IN 1)
Harpoon Thread:
Anti-stripping, roof fixing threads
Incorrect screws create stress cracks and thus leakage on Polycarbonate or other Plastic Sheets
Incorrect screws create stress cracks and thus leakage
on Polycarbonate or other Plastic Sheets.
POLYXPAND™ – SKYLIGHT FIXING FASTENERS
True Australian AS3566 Standard Hex Washer Flanged Head:
Separate EPDM steel bonded washer NOT required. (No risk of leakage)
Thermoset 100% EPDM BAZ washer:
☑Weathering Resistant (UV / Ozone / Acid)
☑100% Leak proof sealing
☑Perfect fit under hex washer flange
☑Optional metal washer add-on
☑Shock absorbing (for high wind areas)
Creates a 10mm dia:
Thermal expansion hole for plastics.
Winged Drilling Tip:
Wings break off once in contact with the steel purlins,
keeping the plastics sheets securely fastened.
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