Aztec MetalFlash Square Base No 4 (70–175 mm) – Black EPDM The Aztec MetalFlash Square Base No 4 is a robust, professional-grade flashing designed for flawless sealing of pipe penetrations measuring 70–175 mm through metal roofing systems. Specifically crafted for corrugated, trim-deck, and standing-seam roofs, this product combines enduring weather resistance with an adaptable design suited for modern construction demands. Key Specifications Feature Details Penetration range 70–175 mm pipe diameter Base shape Square aluminium, approx. 280 mm across Sleeve material Black EPDM rubber Temperature resistance Up to 135 °C intermittently Roof pitch compatibility Suitable for roof pitches up to 45° Colour options Black EPDM – also available in Grey and High‑Temp Red Silicone Warranty 25-year manufacturer guarantee Material & Construction Constructed with black EPDM rubber, the flashing sleeve offers excellent UV resistance, flexibility, and durability. Designed to conform easily to metal roof profiles, the square aluminium base ensures a secure seal with no need for mastics or heat. EPDM maintains elasticity under harsh weather conditions, while silicone variants withstand extreme temperatures up to 260 °C Benefits Versatile sizing – suitable for a wide range of industrial and residential pipe penetrations Robust weatherproofing – ideal for external overflows and vent stacks Quick installation – press-fit sleeve, conform aluminium base to profile, secure with screws or rivets, and seal edges Long service life – backed by a 25-year warranty and designed for up to 45° roof pitch Product Variations Aztec’s MetalFlash range offers several alternatives: Grey EPDM for colour-matching roof finishes High-Temp Red Silicone for applications requiring 260 °C heat resistance Other sizes include No 3 (5–125 mm), No 6 (125–230 mm), and larger models to suit varied penetration dimensions Custom colour-matching to BHP roofing colours is available on request Installation Guide Choose the correct sleeve size for your penetration. Trim the EPDM sleeve to fit snugly around the pipe. Press and mould the aluminium base over the roof profile. Secure using self-drilling screws or pop rivets. Finish with a quality roof-grade silicone sealant at the base edges. The Aztec MetalFlash Square Base No 4 (70–175 mm, Black) delivers an efficient, high-performance solution for sealing sizeable penetrations through metal roofs. With its flexible EPDM sleeve, adaptable aluminium base, and comprehensive size range, it’s the go-to choice for trades seeking secure, weatherproof installations. For additional colour options, greater temperature resilience, or larger size needs, explore Aztec’s full MetalFlash series.
