Leadax Flashing Original

Leadax is the first lead alternative in the world with the same properties as traditional lead. Leadax flashing is not harmful to health or the environment. From cavity walls to chimneys, Leadax is used and processed in exactly the same way as lead — without compromise!

Leadax Flashing Original


More sustainable than lead



Leadax flashing is a completely circular product made from recycled polyvinyl butyral (PVB)



Leadax has won several awards for its innovative lead replacement



Unlike traditional water-resistant materials, Leadax does not contain any heavy metals


Longer roll lengths

Leadax is available in longer strips. So you can seal larger areas with less overlap, saving you materials and time


Polyvinyl butyral (PVB) is the plastic foil in safety glass which could not be reused, until now. There is an abundance of PVB available worldwide. In Europe alone, this pile of waste weighs in at more than 1.5 billion kilograms (each year!). For comparison: This is the weight of 150 Eiffel towers. Besides that, current products for waterproofing buildings are not sustainable, have a large carbon footprint and are (often) toxic. If we want to reach the Sustainable Development Goals of the United Nations in creating a sustainable environment, this problem has to be solved.

Product videos

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Valley application

Leadax lead replacement is a perfect alternative to the zinc valley. One of the benefits Leadax lead replacement has over using zinc is that our product does not have to be formed in the workshop, but can be applied right on the job. This saves time and man-hours. In addition, our lead replacement can be applied in roll lengths of 6 metres. Also, it does not respond to changes in temperature. Even after many years it will not show any cracks on the surface. Since our lead replacement has the look-and-feel of traditional lead it is also suitable for the renovation of heritage buildings. 

Cavity wall

A cavity wall is a place where you'd normally find a lot of lead. However, when you apply lead, you have to create an overlap after every metre, since it'd crack due to temperature changes otherwise. As you can see in the video, Leadax lead replacement is applied in the same manner as lead. This means that the end user does not experience anything different, other than that it's much easier to apply our lead replacement than lead. 

Dormer application

Leadax lead replacement can either be applied directly on the roof, or pre-installed in the workshop, depending on your personal preference. Our lead replacement is available in lead grey, black and terracotta, so it always matches your roof and dormer. Leadax lead replacement is just as robust as lead, so there's no risk involved of the product being affected by the wind. Just to be sure we do advise to use a Hybrid Polymer Sealant to adhere the lead replacement to the roof tiles.

Chimney application

Since Leadax lead replacement has so many uses, it's also perfectly suitable to replace lead in chimney applications. Our lead replacement is applied the same way as lead, including soakers and step flashing. The result is a chimney with a lead replacement, that's indistinguishable from lead at first sight. Moreover, our lead replacement has expanded metal, which makes it easy to trim it to the right size.



The Leadax roller is perfect for moulding our lead replacement around roof tiles or difficult details. It's easy to use for professional results. Due to its ergonomic design, it's comfortable to use for hours on end (should you want to).

Leadax scissors

With the Leadax scissors you can cut our lead replacement to size easily. 

Leadax fixing clips

For use with above-ground masonry. Leadax fixing clips allow you to attach Leadax into masonry joints quickly and easily.

Leadax sealant kit (high-tack)

All-purpose adhesive for fixing Leadax to the base material or for overlapping.

Using today's waste to prevent global waste forever.