× National Flues
We Will NOT Be Beaten on Price.
Free Delivery on Orders Over £100
5 Star Reviewed on Trustpilot
Free Flue Design Service Available
Help? 01670 206999 (8am-5pm)

Mi-Flash No 3 Silicone Flashing 300-450mm (12-18 inch) - High Temp.

Discover the Mi-Flash No 3 Silicone Flashing by National Flues, the ideal choice for modern roof protection. This high temperature flashing, perfect for tiled or slate roofs, offers a robust build with ultra-durable silicone and an aluminium base. Engineered for performance, this product ensures a r... More...
Hover to Zoom / Click for Gallery

At a Glance

  • High temperature resistant silicone material
  • Robust aluminium base for a secure fit
  • Quick and easy installation in under 5 minutes
  • Designed for tiled or slate roofs with pipe diameters of 300-450mm
  • Exceptional weather resistance against UV and ozone
Now only £137.49
Including VAT & Free Delivery Buy with confidence. If you find this cheaper within 48 hours of checkout, we'll refund the difference.

 

Payment Options

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.

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

The Mi-Flash No 3 Silicone Flashing (300-450mm) is an exceptional choice for those seeking a dependable solution for tiled or slate roofs. Constructed from resilient SILICONE, this flashing is formulated to resist extreme temperatures ranging from -74°C to 260°C. Boasting superior weather resistance against ozone and ultraviolet light, this product is designed for long-lasting performance.

Its one-piece build ensures a hassle-free installation that typically takes no longer than five minutes. The versatile base conforms to various panel configurations and roof pitches, ensuring a snug fit around your pipe. To install, simply trim the flashing to the required size, apply silicone sealant, and secure in place for a reliable seal.

SKU: 12-3-TILEHT

Technical Specifications
MaterialHigh Temp Grey Silicone
Aluminium Base Dimensions800 x 800mm (recommended), with alternate sizing up to 890 x 890mm
Pipe Diameter Fit300mm - 450mm (12-18 inch)
Temperature Range-74u00b0C (Continuous) up to 260u00b0C (Intermittent)
Roof Pitch Suitability0u00b0 to 45u00b0
Installation TimeApproximately 5 minutes
Steps to Install: • Prepare the area by clearing any loose debris and ensuring the roof surface is clean • Trim the Mi-Flash No 3 to the required size using a suitable cutting tool • Apply a generous layer of silicone sealant to the backside of the flashing • Carefully remove the tiles (if necessary) around the pipe to allow for a snug fit • Slide the flashing over the pipe ensuring it fits securely against the aluminium base • Re-fit the tiles to cover the top edge, ensuring a neat and weatherproof finish Warnings: Always allow the silicone sealant to cure as per the manufacturer’s recommendations before exposing the installation to extreme weather conditions. Ensure safety protocols are adhered to when working on elevated roofs.

The Mi-Flash No 3 Silicone Flashing can withstand temperatures from -74°C to 260°C, making it ideal for various weather conditions and applications.

This flashing is made of high-quality SILICONE, specifically compounded for maximum resistance to weathering due to ozone and ultraviolet light.

The one-piece construction of the Mi-Flash No 3 allows for quick and easy on-site installation, typically taking no longer than five minutes.

Yes, the Mi-Flash No 3 is designed to form a seal on most panel configurations and roof pitches, making it suitable for a wide range of roof types.

To install, trim the flashing to the required size, apply silicone sealant to the back, remove tiles around the pipe, slide the flashing over the pipe, fasten it to the roof, and cut the tile to fit atop the flashing.

Yes, the SILICONE used in the Mi-Flash No 3 is compounded for maximum resistance to ultraviolet light, ensuring durability in different weather conditions.

The aluminium base measures 800mm x 800mm, and it is suitable for external pipe diameters ranging from 300mm to 450mm (12-18 inches).
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.

Read our buyers guide for this Mi-Flash No 3 Silicone Flashing 300-450mm (12-18 inch) - High Temp.

National Flues Ltd Verdict

The Mi-Flash No 3 Silicone Flashing is one of our top picks for roof flashing solutions. It’s highly durable, easy to install, and perfect for a range of applications. Plus, with National Flues, you can always count on competitive prices, reliable delivery nationwide, and excellent service for both retail and trade customers.

The Mi-Flash No 3 Silicone Flashing is designed to provide a secure and weather-resistant seal for pipes on tiled or slate roofs.

National Flues is a leading supplier of fireplaces and flues across the UK. Known for their competitive pricing and reliable delivery, they provide exceptional service to both retail and trade customers, ensuring complete customer satisfaction.

 

Our Rating Image

Secure your Mi-Flash No 3 today for unmatched reliability and performance—act now and safeguard your roof!

Your recently viewed products:

Multiple Payment Options- including Klarna, Clearpay, Mastercard, Visa and Paypal
Free Design Service