Welcome to National Flues Ltd! We use cookies to power essential features and personalise your experience, ensuring a smooth, secure, and ever-improving journey on our website. Your privacy is our priority—cookies help us remember your preferences and enhance your visit without compromising your data. By continuing to browse, you agree to our use of cookies as detailed in our Cookie Policy. Enjoy your visit and thank you for choosing us!
Cookie Preferences
We use different types of cookies for various purposes. Please select which you allow:
MI-Flash - No 8 Metal Grey SILICONE 178-330mm 435x435
Discover the MI-Flash No 8 Metal Grey Silicone Flashing from National Flues – the ideal, high-quality flashing solution for both residential and commercial roofing applications. Engineered from superior Grey Silicone and designed to accommodate a broad range of pipe diameters, this product is synony... More...
Discover the MI-Flash No 8 Metal Grey Silicone Flashing from National Flues – the ideal, high-quality flashing solution for both residential and commercial roofing applications. Engineered from superior Grey Silicone and designed to accommodate a broad range of pipe diameters, this product is synonymously known as a reliable, durable, and easy-to-install roof flashing. National Flues remains a trusted name in the UK for premium flues and accessories, ensuring both performance and safety for every installation. Less...
Hover to Zoom / Click for Gallery
In Stock
At a Glance
Suitable for profiled sheeting and flat panels
Temperature resistance from -74°C to 260°C
One-piece robust construction for quick installation
Premium Grey Silicone compound for weather and UV resistance
Ideal for pipes with external diameters 178-330mm
Now only
£45.49
Including VAT
Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.
×
Email Product
Enter your email address to send the product details:
Please Note: All dimensions refer to the internal diameter of flues.
If unsure, please call 01670 206999 to ensure you choose the correct products.
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.
Applications and Versatility: The MI-Flash No 8 Metal Grey Silicone Flashing is suitable for various panel surfaces, including profiled sheeting and flat panels. With temperature resistance spanning from -74°C to an impressive 260°C, it's designed to withstand extreme conditions effortlessly.Build Quality and Durability: Constructed from premium silicone, these flashings are specifically compounded for unparalleled resistance to weathering caused by ozone and ultraviolet light. The robust one-piece construction simplifies on-site installation, typically completed within five minutes.Installation Instructions: To install, select the appropriate pipe opening and trim using a Stanley knife or scissors.
Slide the flashing over the pipe - lubrication with grease might be necessary. Shape the flashing to match the roof profile, apply the sealant included in the Fixing Kit, and secure with screws and caps also provided in the kit.This job requires two standard Fixing Kits for proper installation.
SKU: 12-8HT
Technical Specifications
Base Size
435mm x 435mm
Pipe External Diameter
178-330mm
Temperature Range
225°C Continuous - 260°C Intermittent (also withstanding down to -74°C in harsh conditions)
Roof Pitch
0-18°
Material
Premium Grey Silicone
Installation is straightforward. Start by selecting the correct pipe opening size and trim the flashing with a Stanley knife or scissors. Slide the flashing carefully over the pipe – a small amount of grease may be applied to aid smooth positioning. Next, shape the flashing to conform to your roof’s profile. Using the sealant provided in the Fixing Kit, secure the flashing firmly in place with the included screws and caps. Please note: Two Standard Fixing Kits are required for a correct and secure installation. Always check for any obstructions and ensure a clean surface for optimal adhesion.
The MI-Flash No 8 is suitable for both profiled sheeting and flat panel surfaces.
The temperature resistance ranges from -74°C to 260°C.
The installation typically takes no longer than five minutes.
A Stanley knife or scissors is needed to trim the opening, and standard tools to apply screws and caps from the Fixing Kit.
The Fixing Kit includes sealant, screws, and caps required for installation.
Yes, it's compounded specifically for resistance to weathering due to ozone and ultraviolet light.
Two Standard Fixing Kits are required for proper installation of this flashing.
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...
Read our buyers guide for this MI-Flash - No 8 Metal Grey SILICONE 178-330mm 435x435
Overview
The MI-Flash No 8 Metal Grey Silicone Flashing presents an exceptional choice for discerning homeowners and commercial installers alike. Combining modern engineering with robust materials, this flashing is designed to offer a reliable, weatherproof seal around pipes penetrating flat panels or profiled sheeting. Manufactured by National Flues, a leading supplier with a long-standing reputation in the UK, this product meets both the high-demand performance and safety standards essential for modern installations.
Key Features and Benefits
This product is specifically engineered for versatility and durability. The key features include its adaptability to various panel configurations, a temperature resistance range from as low as -74°C up to 260°C, and a robust one-piece construction that simplifies installation. Each of these features has been crafted to ensure that the flashing performs impeccably under adverse weather conditions and extreme temperatures, guaranteeing long-term protection of your building envelope. The durability of the Grey Silicone ensures resistance to both ozone and ultraviolet degradation, meaning less frequent maintenance and replacement.
Detailed Technical Specifications
The flashing’s technical specifications underscore its suitability for a wide range of applications:
• Base dimensions: 435mm x 435mm, ideal for secure placement over large pipe openings.
• Designed to fit pipes with external diameters between 178mm and 330mm, providing flexibility.
• Temperature resilience: Operates continuously at 225°C and intermittently up to 260°C, while also withstanding extreme lows.
• Roof pitch compatibility ranges from 0° to 18°, catering to both low and steep roof profiles.
This detailed technical understanding assists you in ensuring that the flashing is perfectly matched to your specific installation requirements.
Installation Process
Installation of the MI-Flash No 8 is designed to be both rapid and efficient. Begin by carefully measuring the pipe opening to confirm compatibility. Use a Stanley knife or scissors to trim the flashing along the opening precisely. Next, gently slide the flashing over the pipe, applying a small amount of grease if necessary to facilitate a smooth transition. The flashing is then moulded to conform exactly to the roof profile. The final step involves sealing: apply the included sealant from the Fixing Kit, then fix the flashing securely with screws and caps. It is critical to use two standard Fixing Kits to ensure a stable, long-lasting installation.
Performance and Durability
The MI-Flash No 8 transcends standard flashing solutions by offering unparalleled durability, even under the most challenging conditions. Its premium Grey Silicone is specially compounded to resist weathering, including exposure to harsh ultraviolet rays and ozone. This not only prolongs the product’s life but also provides consistent performance year after year, reducing the risks of water ingress and subsequent damage. The robust design and engineering guarantee that your current and future installations benefit from enhanced safety and peace of mind.
Overcoming Common Objections
For many, the initial hesitation in selecting a flashing product stems from doubts about installation complexity or long-term reliability. Rest assured, the MI-Flash No 8 is designed for ease of installation, often completed in just five minutes. Furthermore, its proven performance under extreme temperatures and weather conditions addresses concerns of durability and maintenance. If you find yourself wondering about the necessity of optional accessories, remember that tools such as the Fixing Kit—which includes sealant, screws, and caps—are integral to delivering the full benefits of this product. Optional accessories such as additional sealants or lubrication aids are available if extra assistance is needed during installation, ensuring a bespoke solution for your specific requirements.
Why Choose National Flues?
National Flues stands as a hallmark of quality and reliability within the UK market, offering a wide range of high-quality flashing, flues, and related accessories. Our years of expertise and commitment to excellence mean that each product, including the MI-Flash No 8, is manufactured and tested to meet the highest industry standards. Whether you are a professional installer or a dedicated DIY enthusiast, choosing National Flues guarantees that you receive a product that is not only competitively priced but also backed by exceptional technical support and customer service.
Maintenance and Longevity
One of the most significant advantages of the MI-Flash No 8 is its low-maintenance design. Once installed correctly, the product requires minimal attention, thanks to its resilience against environmental stressors. However, periodic inspections are recommended to ensure that the fixing kits and sealant remain intact and that the flashing continues to provide a secure seal. This proactive approach to maintenance can prevent minor issues from escalating, thereby extending the lifespan and performance of your roof flashing system.
Frequently Asked Questions
Many customers ask: 'Is this product suitable for all types of roofs?' The answer is affirmative—the MI-Flash No 8 is engineered to adapt to various roof pitches and panel configurations. Another common query revolves around its performance in extreme weather. With a tested temperature range up to 260°C and resistance to severe conditions, this flashing is well-equipped to handle both the scorching summer heat and the biting winter cold. The ease of installation further enhances its appeal, as even those with limited experience will find the process straightforward and manageable.
Final Considerations
When considering an investment in roof flashing, it is crucial to weigh quality, durability, and ease of installation. The MI-Flash No 8 Metal Grey Silicone Flashing ticks all these boxes and offers additional peace of mind through its premium material composition and tested performance metrics. For those who intend to secure their homes or business properties against the harshest weather conditions, this product represents a prime choice.
To prepare for your next installation project, take the time to review all technical details and optional accessories available. Our product line includes a selection of accessories that can further streamline your installation process and enhance the overall effectiveness of your flashing solution. Whether you are upgrading an existing system or embarking on a new installation, the MI-Flash No 8 is engineered to deliver exceptional results with minimal fuss.
To secure your installation, add to your cart now or call 01670 206 999.
National Flues Ltd Verdict
The MI-Flash No 8 Metal Grey Silicone Flashing is a top-tier product, built for resilience and ease. We at National Flues are proud to deliver this nationwide to both our retail and trade customers. Rarely beaten on price, we ensure quality and reliability with every order.
The MI-Flash No 8 Metal Grey Silicone Flashing is used to ensure a weatherproof seal around pipes that exit through profiled or flat panel roofs.
National Flues is a leading UK supplier offering a wide range of high-quality fireplaces and flues to retail and trade customers. Known for reliable delivery and competitive pricing, National Flues ensures secure online payments and trade account options.
Invest in the MI-Flash No 8 Metal Grey Silicone Flashing now for a secure and durable solution.
