Aztec MetalFlash No3 5-125mm

The Aztec MetalFlash No3 is a pipe flashing for metal roofs, sealing penetrations from 5 to 125mm. This version uses a high-temperature red silicone sleeve rated to 260C intermittently, which makes it the pick for demanding installations such as exhaust vents, flues and hot water outlets. The square aluminium base moulds to the roof profile, so the flashing forms a watertight seal without mastics or heat.

Key Features

• Fits pipe and conduit penetrations from 5 to 125mm
• High-temperature red silicone sleeve rated to 260C intermittent
• Square aluminium base moulds to metal roof profiles
• Suits roof pitches up to 45 degrees
• Weather and UV resistant, retains flexibility like EPDM with higher heat tolerance
• 25 year manufacturer coverage

Specifications

• Product: Aztec MetalFlash No3
• Pipe range: 5-125mm
• Sleeve material: high-temperature red silicone
• Temperature rating: up to 260C intermittent, 225C continuous, tested 70 hours at 260C
• Base: flexible square aluminium
• Roof pitch: up to 45 degrees
• Warranty: 25 years

Installation

Slide the flashing over the pipe and press the square base down over the roof profile. The soft aluminium shapes around the corrugations or standing seams by hand, and the silicone sleeve seals against the pipe. Trim the sleeve to the exact pipe diameter where needed, then fix the base down with suitable fasteners. No mastic and no heat are required.

Applications

• Exhaust vents and flues through metal roofs
• Hot water outlet pipes and PPE systems
• Plumbing and ventilation penetrations
• Roofs where a high-temperature pipe flashing is specified

What You Need To Complete The Job

For a standard-temperature pipe use the black EPDM No3, and for a hot flue up to 175mm the No4 in red silicone. Browse the Metal Roof Flashing range for the full kit.

Frequently Asked Questions

Why is the silicone version rated so high?

The red silicone sleeve is tested to withstand 260C intermittently and 225C continuously, with a 70 hour test at 260C. That is what makes it suitable for exhausts, flues and hot water outlets that would soften a standard EPDM flashing.

What pipe sizes does it cover?

It covers pipes and conduits from 5 to 125mm, which is a wide range. The sleeve is trimmed to the exact pipe diameter for a snug fit.

Does it suit standing-seam roofs?

Yes. The soft aluminium base moulds around the standing seam and the corrugations, so the flashing follows the profile. It suits flat, corrugated and standing-seam metal roofs up to 45 degrees.

Is the silicone more flexible than EPDM?

It is similar in flexibility but with a higher heat tolerance. That makes it the choice where the pipe runs hot, while the black EPDM version is a good standard pick for normal plumbing and vent pipes.

Can I order for delivery or pickup?

Yes. You can order online and choose Australia-wide delivery or pickup from our Truganina trade counter in Melbourne’s west. Delivery windows depend on your postcode, and we send a confirmation once your order is ready. For any questions call (03) 93941400 or email orders@singhroofingsupplies.com.au.