Aztec MetalFlash Square Base No 3 (5–125 mm) – Black EPDM

The Aztec MetalFlash Square Base No 3 is a superior metal roof pipe flashing engineered for simple, reliable weatherproofing of penetrations ranging from 5 mm to 125 mm in diameter. Designed specifically for profiled metal roofing, this flashing delivers a watertight seal without the need for mastics or heat, blending durability with on-site adaptability.

Key Specifications & Performance

Feature	Details
Penetration Range	5–125 mm
Temperature Rating	EPDM: up to +135 °C intermittent, +100 °C continuous
Base Shape	Square aluminium base, approximating 196–221 mm width
Colours Available	Standard in Black; also available in Grey and Red Silicone
Roof Pitch Compatibility	Suits 0–45° flat, corrugated and standing seam roofs
Warranty	Full 25‑year manufacturer’s warranty

EPDM rubber sleeve is UV-, ozone- and weather-resistant, providing lasting elasticity and resilience. The square aluminium base is soft enough to mould to profiled roofing yet firm enough to maintain a tight, secure seal.

Product Advantages

Flexible sleeve design allows movement and vibration without leaking
No hot work or additional sealants required—cut, shape, attach
High-grade EPDM resists extreme climates and weathering
Aluminium base accommodates all common metal roofing profiles
Pre-set durability: suitable for standard and BAL-rated roofs

Available Variations

Aztec offers several complementary MetalFlash models:

Grey EPDM or Red High-Temp Silicone versions, rated to +260 °C
Larger penetration sizes via No 4, 6, 7, etc., increasing up to 300 mm
Square, round, retrofit, solar-twin, and vent flashings—all with interchangeable bases

Typical Applications

Pipe flues, ventilation stacks, conduits on metal roofs
Roof cable entries and sensor stalks
Retrofitting new penetrations or re-sealing old flashings
Supporting compliance on BAL-rated or coastal properties

Installation Guide

Choose the correct MetalFlash size for your penetration
Trim the EPDM sleeve so it’s snug and slightly undersized relative to pipe
Press the aluminium base into the roof profile, forming it to the surface
Secure using self-drilling screws or sealed pop rivets
Seal edges with quality roof-gutter silicone

The Aztec MetalFlash Square Base No 3 (5–125 mm, Black) flashing combines premium EPDM rubber with a soft-conform aluminium base to create a neat, secure, and long-lasting seal for metal-roof penetrations. With a high temperature tolerance, adaptability across multiple roof shapes, and robust warranty, it is the professional’s choice for versatile and dependable heat-resistant flashings.

For higher temperatures, colour variants, or larger penetrations, explore the MetalFlash No 3–No 7 range in EPDM and high‑temperature silicone options.