MasterFlash No. 7 Square‑Base 140–292 mm – Black

The MasterFlash® No. 7 Square‑Base is the trusted, professional-grade solution for sealing pipe penetrations through metal, tile, shingle, or membrane roofs. Designed to provide long-lasting performance, it’s ideal for plumbing, ventilation, cable penetrations, chimney flues, solar ducts, and more.

Specifications

Feature	Value
Pipe diameter range	140–292 mm (5½″–11½″) – marked, cut-to-fit sleeve
Base dimensions	355 mm × 355 mm (14″ × 14″) aluminium plate
Sleeve material	Black EPDM rubber; UV, ozone and tear-resistant
Temperature performance	EPDM rated up to +135 °C intermittent; silicone variant to +260 °C intermittent
Temperature range (EPDM)	-55 °C to +100 °C continuous, +135 °C intermittent
Roof pitch suitability	Up to 45° (standard); use Extreme-Angle for 35–65°
Warranty	25 years (manufacturer-backed)

Available Variations

Sleeve Colour/Material Options
- Black EPDM (standard)
- Grey EPDM
- Red silicone (high‑temperature) – rated to +260 °C
- Special colours (e.g., BHP steel colours) available on request
Design Variants
- Multi-Flash/Multi‑Flash No. 7: dual-mode product—can be used as standard or retrofit, comes with stainless-steel gripper, covers 140–292 mm (standard) or 127–279 mm (retrofit)
- Square Vent Range: suits square pipe penetrations 20–125 mm
- Extreme‑Angle range: fitted with a 40° slant for steep roofs (35–65°)
Sizes across range: No. 1 through No. 9, Maxi and Maxi‑XL, covering 0 mm to 1 000 mm pipes

Benefits & Installation

Effortless installation: Sleeve is pre-marked for easy size selection—cut 20–30% smaller than pipe diameter for compression seal; aluminium base moulds by hand to roofing profile
Flexible, weatherproof seal: EPDM provides elasticity to absorb thermal movement, while ribbed aluminium base, when combined with sealant, gives superior waterproof integrity
Retrofit-ready: Multi-Flash version simplifies installation on fixed or inaccessible pipes with included stainless‑steel gripper
Accessories: Use quality roof & gutter silicone sealant and self-drilling screws or sealed pop rivets (≤ 38 mm spacing) for secure fixing

Why Choose MasterFlash No. 7?

Industrial-grade resilience: Suited for commercial roofing—UV, ozone and weather-resistant EPDM, optional high-temp silicone variant
Precision fit: Wide sleeve range with clear markings ensures accurate seal for pipe sizes 140–292 mm
Long-term assurance: Backed by up to 25-year warranty—confidence that makes it a favourite among installers

In summary, the MasterFlash No. 7 Square‑Base 140–292 mm (Black) offers professional-grade durability, flexible installation, and a choice of sleeve materials to suit temperatures and applications—an essential item for any roofing project focused on quality and longevity.

What is the highest temperature a Master Flash® pipe flashing will handle?
– All EPDM MasterFlash flashings 135°C intermittently.
– A silicone red flashing has a high resistance of 260°C intermittently.
What type of sealant should be used on the Master Flash® flashings?
– A good quality roof & gutter silicone sealant should always be used when installing a Master Flash pipe flashing for metal roofs.
What type of screws should be used to fasten the flashings?
– The use of a self-drilling screw or pop rivet (sealed) is always recommended.
What is the life expectancy of the Master Flash® flashings?
– All Master Flash products carry a 25-year warranty.
What is the maximum roof pitch that the flashings can be used for?
– Most of our products are designed to cater to a roof pitch of 45°. If more is required, then our Master Flash Extreme Angle range is designed with a built in 40° pitch and therefore can handle a roof pitch from 35° – 65°.
Is there a product that can flash a Square Pipe?
– Yes, our Master Flash Square Vent Range is available and will suit penetrations from 20mm – 125mm. Now also available in a lead base option.