Skylight screw fixing fasteners
POLYXPAND™ – Fixing Polycarbonate Sheeting to Metal
Secure your plastic skylight with our trusty and durable BDN Polyxpand self-drilling fasteners. Polyxpand creates an expansion hole in a one-shot process, fixing skylights easily onto steel substrates.
BDN POLYXPAND™ fasteners are designed to create a much-required thermal expansion hole on plastic roofing materials and then securely fastened onto the purlin underneath in one-go. Owing to the wings on the drilling tip, a 10mm diameter thermal expansion hole is created during the process, which then snaps off immediately upon coming in contact with steel. A large BAZ washer completes the package, covering the expansion hole while providing superior strength against high winds.
Features and Benefits
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.
For size not indicated below , please contact for further information
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