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Mi-FLEX Insulation for Efficient Fireplace and Flue Insulation in the UK

Mi-FLEX Insulation is a top choice for insulating fireplaces and flues in the UK. With products like Rockwool Tubes, Chimwrap, Granular, and Fire Boards, Mi-FLEX offers superior heat retention, protection, and energy efficiency. Whether you need to line a chimney, insulate a fireplace, or enhance fireproofing, Mi-FLEX has you covered with high-quality insulation solutions.
Mi-FLEX Insulation is a top choice for insulating fireplaces and flues in the UK. With products like Rockwool Tubes, Chimwrap, Granular, and Fire Boards, Mi-FLEX offers superior heat retention, protection, and energy efficiency. Whether you need to line a chimney, insulate a fireplace, or enhance fireproofing, Mi-FLEX has you covered with high-quality insulation solutions.


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The best selling flue liner in the UK. Suitable for gas, oil, and approved solid fuels. Call our advisers on 01670 206 999 if you need any help choosing.

£26.99 £392.99
Showing 15 of 15 items
CHIMWRAP Liner Wrap 1000mm - Ø 175/200

CHIMWRAP Liner Wrap 1000mm - Ø 175/200

90-CW175200
£84.99 (including VAT)
In stock
Mi-Flexwrap 10m x 12mm Insulated Blanket  125mm or 150mm

Mi-Flexwrap 10m x 12mm Insulated Blanket 125mm or 150mm

90-FW600-10
£235.99 (including VAT)
In stock
Mi-Flexwrap 10m Kit (10m Blanket, 20 Bands, 12m Tape) 125mm or 150mm

Mi-Flexwrap 10m Kit (10m Blanket, 20 Bands, 12m Tape) 125mm or 150mm

90-FW600-10K
£274.99 (including VAT)
In stock
Mi-Flexwrap 10m x 12mm Insulated Blanket  180mm or 200mm

Mi-Flexwrap 10m x 12mm Insulated Blanket 180mm or 200mm

90-FW850-10
£342.99 (including VAT)
In stock
Mi-Flexwrap 10m Kit (10m Blanket, 20 Bands, 12m Tape) 180mm or 200mm

Mi-Flexwrap 10m Kit (10m Blanket, 20 Bands, 12m Tape) 180mm or 200mm

90-FW850-10K
£392.99 (including VAT)
In stock
Leca 50L Bag

Leca 50L Bag

90-LECA
£27.99 (including VAT)
In stock
Rockwool Tube - 1000mm long  125mm

Rockwool Tube - 1000mm long 125mm

90-RPS-125
£34.99 (including VAT)
In stock
Rockwool Tube - 1000mm long  150mm

Rockwool Tube - 1000mm long 150mm

90-RPS-150
£41.99 (including VAT)
In stock
Rockwool Tube - 1000mm long  200mm

Rockwool Tube - 1000mm long 200mm

90-RPS-200
£59.99 (including VAT)
In stock
Aluminium Tape

Aluminium Tape

90-RPS-T
£26.99 (including VAT)
In stock
Vermiculite (100L Bag)

Vermiculite (100L Bag)

90-VERM
£34.99 (including VAT)
In stock
Glass Rock Board - 2400x1200x15mm

Glass Rock Board - 2400x1200x15mm

96-GLSROCK-15
£167.99 (including VAT)
In stock
Insulation Back Filler - Ø 150

Insulation Back Filler - Ø 150

25-150-VBF
£43.99 (including VAT)
Out of stock
CHIMWRAP Liner Wrap 1000mm - Ø 125/150

CHIMWRAP Liner Wrap 1000mm - Ø 125/150

90-CW125150
£91.99 (including VAT)
Out of stock
Supalux Board (SXB0984) - 1220x2440x9mm

Supalux Board (SXB0984) - 1220x2440x9mm

96-SUPALUX
£260.99 (including VAT)
Out of stock
Your Mi-FLEX Insulation Questions Answered

What is Mi-FLEX Insulation made of? -

Mi-FLEX Insulation is typically made of high-quality materials like Rockwool, ensuring excellent thermal insulation properties and fire resistance.

How can Mi-FLEX Insulation benefit my fireplace? +

Are Mi-FLEX products easy to install? +

Can Mi-FLEX Insulation be used for commercial applications? +

Do Mi-FLEX products meet UK safety standards? +

How long does Mi-FLEX Insulation last? +

Can Mi-FLEX products be combined with other insulation materials? +

Are Mi-FLEX products environmentally friendly? +

Mi-FLEX Insulation provides a range of products tailored to enhance the performance of your fireplace and flue systems. The Rockwool Tubes come in various sizes, offering excellent thermal insulation properties. Chimwrap Liner Wrap ensures secure insulation for your chimney, while the Mi-Flexwrap Kits provide all-in-one insulation solutions. Fire Boards offer added protection and durability, making Mi-FLEX a reliable choice for both residential and commercial applications. Trust Mi-FLEX to deliver efficient and safe insulation for your fireplace and flue needs in the UK.
Why Buy Mi-FLEX Insulation Products
Mi-FLEX Insulation is ideal for a variety of applications in the fireplace and flue industry. Use Rockwool Tubes to insulate chimneys, fireplaces, and flue systems for improved heat retention and energy efficiency. Chimwrap Liner Wrap provides a secure barrier to protect your chimney liners, ensuring optimal performance. Mi-Flexwrap Kits offer easy-to-install insulation solutions that enhance fireproofing and safety. Whether you're a homeowner or a professional, Mi-FLEX products are designed to meet your insulation needs with quality and reliability.

Trusted By Trade Professionals

Our Mi-FLEX Insulation products and services are trusted by hundreds of professionals nationwide. We're committed to providing quality and reliability that meets the high standards of our customers.

Dedicated Support

Experience our unparalleled customer service and support when you buy Mi-FLEX Insulation from National Flues. Our team is here to assist you every step of the way, ensuring your needs are met with expertise and care.

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