No 6 Silicone Masterflash 127-228mm (5 to 9 inch) - High Temp.
At a Glance
- - High Temperature Resistant: Withstands -74°C to 260°C
- - Universal Compatibility: Fits external pipe diameters from 127mm to 228mm
- - One-Piece Design: Ensures quick, hassle-free installation
- - Durable Silicone Construction: Offers superior resistance to weathering, ozone, and UV exposure
- - Versatile Application: Suitable for profiled sheeting and flat panel surfaces

We Won't Be Beaten On Price
At National Flues, we continuously monitor competitor prices. This ensures that we consistently offer you the best deals on all our products. Here’s how we keep your costs low:
- Daily Price Matching: Our team adjusts prices to ensure we stay competitive.
- Bulk Purchasing Power: We sell a lot, so we can negotiate better rates with suppliers, passing the savings directly to you.
- Operational Efficiency: We have streamlined processes to reduce overhead.
Price Match Guarantee: If you find the same product cheaper within 48 hours, we’ll match it and refund the difference.
Free Delivery Over £100: Orders over £100 are free delivery (call us if delivery is required outside the mainland UK).
“I saved 20% on my purchase compared to other retailers. Exceptional service!” – Jane D.
Have Questions?
Phone: 01670 206999
Email: [email protected]
- Info
- Specs
- Install
- FAQs
The No 6 Silicone Masterflash 127-228mm (5 to 9 inch) is ideally suited for profiled sheeting and flat panel surfaces. It boasts an impressive temperature resistance from -74°C to 260°C, making it perfect for a variety of environments. Constructed from high-quality silicone, these flashings are specifically compounded to offer maximum resistance to weathering, including ozone and ultraviolet light.
The one-piece design ensures quick and hassle-free installation, typically taking no longer than five minutes. The base is engineered to form a secure seal on most panel configurations and roof pitches, regardless of pipe location. For easy installation, follow these steps: select the appropriate pipe opening and trim with a Stanley knife or scissors, slide the flashing over the pipe (lubricate if necessary), form the flashing to match the roof profile, apply sealant from the Fixing Kit, and finally, fasten with the screws and caps provided in the Fixing Kit.
One standard Fixing Kit is needed for installation.
SKU: 32-602
Technical Specifications | |
---|---|
Base Size Diameter | 304 x 304mm |
Pipe External | 127-241mm |
Roof Pitch | 0-18u00b0 |
Temperature Range | 225u00b0C Continuous - 260u00b0C Intermittent (Rated up to 260u00b0C, operational from -74u00b0C) |
Material | High-Quality Silicone |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, April 8th. If you need faster stove or fireplace delivery please give us a call. We can often reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.
Warranty & Returns +
All our products come with warranties. Mi-Flex offers a lifetime guarantee. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.
Price Match Guarantee +
We will match any price like for like. If you find it cheaper within 48 hours, we'll refund the difference.
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National Flues Ltd Verdict
The No 6 Silicone Masterflash is the epitome of reliability and efficiency. With its high-temperature resistance and straightforward installation, it's a must-have for both retail and trade customers. Enjoy nationwide delivery and unbeatable prices with National Flues.
The No 6 Silicone Masterflash is designed to seal pipes passing through profiled sheeting and flat panel surfaces, ensuring a reliable and weather-resistant installation.
National Flues is a leading supplier of fireplaces and flues, serving retail and trade customers across the UK. We pride ourselves on unbeatable prices, reliable delivery, and superior customer service.
