Fast a Flex
Fast‑a‑Flex is a flexible, lead-free roof flashing designed for sealing flashings, abutments, valleys, and penetrations. It’s self-adhesive, UV-resistant, and easy to install, offering a clean, professional finish without the hassle of traditional lead. Available in black, graphite, and terracotta to suit a range of roof types.
Using Fast a Flex
Flashings seal the joints where the roof meets walls, chimneys, vents and other penetrations. Fast a Flex is used to keep water out at those joints. Dress flashing into the tile profile, lap joints so water runs over them, and seal the top edge where it meets a wall.
Available colours: Terracotta, Graphite, Grey, Black.
Goes well with
- Roofing silicone and a silicone gun
- Flexible pointing for ridge and hip caps
- Replacement tiles around the flashing
Pickup and delivery
Collect Fast a Flex from our Doveton or Mulgrave yard, or order online for delivery. Delivery is free on orders over $400 within about 20 km of either yard, with a flat $70 fee for smaller orders in the same area. See shipping and delivery for the details.
Related guides
See all roofing materials.
Fast a Flex: common questions
Can I seal around a roof penetration with flashing tape?
Yes. Self-adhesive flashing tape bridges joints and seals around pipes and vents, provided the surface is clean and dry.
Should I replace split or corroded flashing?
Yes. Sealant over failed flashing is a short-term fix. Replace it and seal the joints properly.
Our Store Locations
Mulgrave yard
Address
6 Rosemary Ct, Mulgrave VIC 3170
Phone
1300 992 911
Email
info@roycebuildingsupplies.com.au
Hours
Mon to Fri 6:30am to 4:30pm
Sat 7:00am to 1:00pm
Doveton yard
Address
14A Power Rd, Doveton VIC 3177
Phone
0432 779 667
Email
info@roycebuildingsupplies.com.au
Hours
Mon to Fri 6:30am to 4:30pm
Sat 7:00am to 1:00pm