No 3 Silicone Masterflash 6-102mm (1/4 to 4 inch) - High Temp.
At a Glance
- - High Temperature Resistance: Withstands up to 260°C intermittently and 225°C continuously
- - UV and Ozone Resistant: Long-lasting performance even under harsh weather
- - Versatile Fit: Accommodates pipe diameters from 6mm to 102mm (1/4 to 4 inch)
- - Quick Installation: One-piece design enables installation in under five minutes
- - Suitable for Multiple Roofing Types: Ideal for both profiled sheeting and flat panels

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 3 Silicone Masterflash 6-102mm (1/4 to 4 inch) - High Temp is an essential component for ensuring a secure and durable seal around pipes on metal roofs. Constructed from high-quality SILICONE, it boasts maximum resistance to weathering caused by ozone and ultraviolet light, making it ideal for long-term outdoor use. This masterflash is suitable for both profiled sheeting and flat panel surfaces, withstanding temperatures from as low as -74°C up to a scorching 260°C.Designed for quick and easy installation, the one-piece construction means you can have it fitted in under five minutes.
The base is crafted to conform to most panel configurations and roof pitches, ensuring a tight fit regardless of pipe location. When it comes to fitting, simply choose the appropriate pipe opening, trim accordingly, and slide the flashing over the pipe. With the application of sealant and the use of the Fixing Kit (which includes screws and caps), the installation process is straightforward and efficient.
SKU: 32-302
Technical Specifications | |
---|---|
SKU | 32-302 |
Product Name | No 3 Silicone Masterflash 6-102mm (1/4 to 4 inch) - High Temp. |
Base Size Diameter | 203 x 203mm |
Pipe External Range | 6-114mm |
Roof Pitch | 0-18u00b0 |
Temperature Range | Continuous 225u00b0C, Intermittent 260u00b0C (withstand down to -74u00b0C) |
Delivery Information +
We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Thursday, April 3rd. 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.
Compatible and other products that may be of interest...
National Flues Ltd Verdict
The No 3 Silicone Masterflash is a top-choice for anyone needing high-temperature resistant flashings. Its easy installation and durability make it perfect for various applications. With our reliable nationwide delivery and competitive prices, National Flues ensures you get the quality products you need. Serving both retail and trade customers, we're your trusted flue and fireplace supplier.
The No 3 Silicone Masterflash is used to create a secure seal around pipes that protrude through metal roofing, ensuring durability and weather resistance.
National Flues is a trusted provider of fireplaces and flues in the UK. Renowned for high-quality products and exceptional customer service, they cater to both retail and trade customers with competitive prices and reliable nationwide delivery.
