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Ubiflex Grey 3.5mm B3 Lead Alternative

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£43.24 Incl. VAT
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Made with modified polyethin compound with an aluminium mesh re-inforcement. Ubiflex is a non-lead flashing material which can be used in all applications where lead is traditionally installed. Ubiflex is environmentally friendly, non-toxic and recyclable. Ubiflex is only of value to the installer as it has no re-sale value as scrap.

Ubiflex is 80% lighter than lead giving handling, structural, health and safety advantages. It is also 50% quicker to install than lead, is fully malleable, can be worked in both directions and is self-sealing if punctured. Ubiflex is not susceptible to thermal movement, this allows aprons up to 12m long to be formed without seams or expansion joints which means there is less wastage than with traditional materials.

Ubiflex B3 is also BBA Certified and is also approved by the NHBC (National House Building Council) and Zurich insurance.

To ensure Ubiflex Lead Alternative Flashing is installed correctly, please use Ubiflex High Tack Sealant.


  • Stepped flashings
  • Abutment flashings
  • Chimney flashings
  • Pitched valley lining
  • Rooflights and solar panels
  • Dormers


Length 12m
Thickness 3.5mm Width 150mm


Type Lead-Free Flashing Colour Grey


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Questions & Answers


Can it be laid in a box gutter as a single piece


I will email you some ideas


Is this suitable as alternative to lead.valley


Good Morning Michael


No, that's not the right product you need something like https://www.roofingsuperstore.co.uk/product/everbuild-lead-mate-sealant-box-of-25.html


Is this malleable enough to use on a corrugated roof?


The Ubiflex flashing rolls are fully malleable and can conform to almost any profile including metal or fibre cement corrugations. 


What is the weight of a 6m roll. I am taking it to spain on a flight.


I can confirm that the weight of this roll is 9.6kg.

Have a question about this product?


5 / 5 10 reviews
gary warnock
Reviewing Ubiflex B3 Lead Alternative Flashing 250mm x 12m (3.5mm Thick) - Grey
2nd September 2021
its just as described
Tim Bint
Reviewing Ubiflex B3 Lead Alternative Flashing 400mm x 12m (3.5mm Thick) - Grey
2nd May 2021
Perfect for the application we used it in vertical Steppedf lashing , longer sections that we could have done in lead
Reviewing Ubiflex B3 Lead Alternative Flashing 300mm x 6m (3.5mm Thick) - Grey
9th December 2020
Exactly what I expected
Alistair Milne
Reviewing Ubiflex B3 Lead Alternative Flashing 300mm x 6m (3.5mm Thick) - Grey
5th September 2020
Fast efficient delivery, very well packaged. Highly recommended
Kenneth Gale
Reviewing Ubiflex B3 Lead Alternative Flashing 1000mm x 6m (3.5mm Thick) - Grey
6th August 2020
the flashing is fine but use care in hot weather as it does go very soft
Kenneth Gale
Reviewing Ubiflex B3 Lead Alternative Flashing 1000mm x 6m (3.5mm Thick) - Grey
27th July 2020
needs careful handling when the weather is hot can go thro it by standing on it
Stanley Bourne
Reviewing Ubiflex B3 Lead Alternative Flashing 200mm x 6m (3.5mm Thick) - Grey
9th July 2020
Easy to use and fix to walls.
Robert McGee
Reviewing Ubiflex B3 Lead Alternative Flashing 300mm x 12m (3.5mm Thick) - Grey
29th June 2020
Much better to work with than lead and much safer and lighter plus half the price
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Ubiflex Grey 3.5mm B3 Lead Alternative

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