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MI-Flash - No 4 Metal Grey SILICONE 76-152mm 250x250 (12-4HT)

Discover the superior performance of the MI-Flash No. 4 Metal Grey Silicone Flashing by National Flues. Our premium silicone flashing is tailored for both profiled sheeting and flat panel surfaces, delivering unmatched durability under extreme conditions. As a market leader in high temperature resistance and weatherproofing, this product sets the benchmark for quality silicone flashings in the UK. Whether you are a retail customer or a professional tradesperson, our MI-Flash No. 4 is the perfect Read more...
The price you pay today £24.99
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At a Glance

    High-grade Grey Silicone for enhanced durability
    Temperature resistance from -74°C to 260°C
    Suitable for both profiled sheeting and flat panel surfaces
    Rapid installation with a one-piece design and supplied Fixing Kit
    Versatile base fits most panel configurations and roof pitches
Delivery Information +

We work relentlessly to ensure you get your order fast. Estimated delivery for this product is Tuesday, July 1st. This is based on current delivery times for this product. Delivery for products not in our warehouses can be delayed because of third party carriers. If you need a stove, or other bulky product, to be delivered by a specific time in the next 7 days then please give us a call. We can sometimes reduce longer lead times if we pay the carrier £25 for express delivery. Visit our Shipping Information page for more information.

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All our products come with warranties and you can read in our blog about they types and terms and conditions for warranties. Mi-Flex flue liner, for example, comes with a lifetime guarantee. Give us a call if you want to know about a specific warranty. Returns for damaged items are covered by insurance; non-damaged returns incur return delivery costs.

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We will match any price, like-for-like, on a retail basis. Give us a call if you find it cheaper and want to buy from us.

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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:

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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).

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Have Questions?
Phone: 01670 206999
Email: [email protected]

The MI-Flash No. 4 Metal Grey Silicone Flashing 76-152mm is specifically designed for use with profiled sheeting and flat panel surfaces. With an impressive temperature resistance from -74°C to 260°C, it stands up to extreme conditions. Constructed from high-grade silicone, this flashing is built for maximum resistance to harsh weather elements including ozone and ultraviolet light.

Its one-piece design promotes quick, easy on-site installation—typically taking no longer than five minutes. The versatile base ensures a reliable seal on most panel configurations and roof pitches, regardless of pipe location. Installation is a breeze: simply choose the pipe opening, trim, slide the flashing over the pipe, form to the roof profile, apply sealant, and fasten using the supplied Fixing Kit.

SKU: 12-4HT

Technical Specifications
SKU12-4HT
Base Size250mm x 250mm
Pipe External Diameter76-152mm
Roof Pitch0-18u00b0
Temperature Range225u00b0C Continuous - 260u00b0C Intermittent (Operational from -74u00b0C)
Flashing MaterialHigh-grade Grey Silicone
Installation MethodOne-piece design with supplied Fixing Kit (includes sealant, screws, and caps)
Installation is designed to be simple and efficient. Begin by selecting the appropriate pipe opening. If necessary, trim the flashing to suit the dimensions of your pipe and roof profile. Slide the flashing over the pipe, ensuring that it aligns properly with the surface. Form the flashing to closely follow the roof pitch. For an optimal seal, apply the provided sealant and secure the flashing with the included screws and cap Fixing Kit. Always check that the flashing is fitted snugly without any gaps to prevent water ingress. Optional accessories such as additional sealants or specialised trims can be sourced separately for bespoke installation needs.

The MI-Flash No. 4 Metal Grey Silicone Flashing is suitable for both profiled sheeting and flat panel surfaces.

This flashing offers impressive temperature resistance, ranging from -74°C to 260°C.

The flashing is made from high-grade silicone, ensuring maximum resistance to weathering caused by ozone and UV light.

Installation typically takes no longer than five minutes due to its one-piece design and user-friendly fixing kit.

The Fixing Kit includes sealant, screws, and caps for a secure installation.

To install, choose the pipe opening, trim if necessary, slide the flashing over the pipe, align to the roof profile, apply sealant, and secure with the fixing screws and caps.

Yes, the base design allows it to form a reliable seal on most panel configurations and roof pitches.

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