Aztec MetalFlash SqBaseNo3 5-125mm Sil

Aztec MetalFlash Square Base No 3 (5–125 mm) – High‑Temp Red Silicone

The Aztec MetalFlash Square Base No 3 in high-temperature red silicone is a professional-grade pipe flashing designed for metal roofing applications. Offering a robust seal for pipes and conduits from 5 mm to 125 mm, the high-temp silicone cone withstands intermittent heat up to +260 °C, making it ideal for demanding installations such as exhaust vents, flues, and hot water outlets.

Key Specifications

Material & Build Quality

Made from premium-grade materials, the silicone sleeve is both weather and UV resistant, offering superior flexibility similar to EPDM but with enhanced thermal capabilities. The aluminium base is soft enough to conform to corrugated, trim-deck, or standing-seam profiles, ensuring full contact and a reliable seal.

Why Silicone?

• High-temperature resilience: Red silicone models are rated for extreme heat, perfect for flues or hot vents

• Flexible and long-lasting: Maintains elasticity in both high heat and colder climates.

• Clean installation: No flame, hot-melt adhesives, or mastics necessary—simply cut to pipe size, press onto the roof, secure, and seal.

Available Variations in the MetalFlash Range

Aztec offers a complete line of MetalFlash products to cover all penetration scenarios:

• Square Base No 3: 5–125 mm in black or grey EPDM, plus high-temp red silicone for 260 °C resistance

• No 4 and No 6: For larger penetrations—70–175 mm and 125–230 mm respectively, also available in EPDM or silicone

• Colour options: Black, grey EPDM or high-temp silicone red; custom roofing colours available upon request

Installation Guidelines

1. Trim the silicone cone to suit the pipe diameter for a snug fit.

2. Press the aluminium base onto the metal roof profile until fully formed.

3. Secure using self-drilling screws or sealed rivets.

4. Finish with a quality roof-grade silicone sealant around the base perimeter.

The Aztec MetalFlash Square Base No 3 (5–125 mm, Red Silicone) offers robust thermal performance, reliable sealing, and excellent flexibility—making it an exceptional choice for penetrations requiring hot-air resistance. With a 25-year warranty, adaptable roofing compatibility, and support for custom colours, it is a dependable solution for professional installation across residential, commercial, and industrial projects. Explore the full range for larger sizes or EPDM alternatives.