Leadax Flashing | Original

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

Leadax Flashing | Original


More sustainable than lead



Leadax Original 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' products do not contain any heavy metals


Longer roll lengths

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

Using today's waste to prevent global waste forever

Using today's waste to prevent global waste forever

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.

Available colours

Lead grey

Lead grey is a great color when you're a fan of using lead, but also realize there are lead replacements around which will make your job easier. When we designed Leadax Flashing, we wanted to make sure you don't have to compromise on aesthetics. The result is Leadax Original: a lead replacement with the look-and-feel of traditional lead. Since you will not be able to spot a difference between traditional lead and Leadax Flashing we aptly named this color lead grey.


Lead grey is a great color, but sometimes it "just doesn't cut it". Leadax Flashing in black is a great lead alternative to lead, but offers some major benefits, not just aesthetically. Leadax Flashing is easy to process, available ánd applicable in 6 metre lengths and up to 80% lighter than lead. Your back will thank you. 


Imagine sitting outside your patio in Ibiza, drinking a sweet Mojito and enjoying the late afternoon summer sun. You lift your sunglasses to take a look at the pool and you're contemplating if it's a good idea to go for a swim. It's getting late already, but since it's so warm it might be nice to do so, after which you'll take a shower and get ready for the evening.

But then, all the sudden, something catches your eye and your jaw drops to the floor. You can't believe what you're seeing. You're shivering, you're getting cold, although it's still so warm. For a moment you're thinking about calling your partner to discuss the monstrosity in front of you: Your beautiful, dimly lit white patio has a lead grey waterproofing product. Eww.. 

From now on, you don't have to worry about this anymore. Leadax Flashing is also available in white.


Did you know? The word terracotta has its origins in Italy and literally means "baked earth". The clay has been used for many, many years. The oldest terracotta pottery known to date was created in 24.000 BC. However, its most famous use has to be the China's Terracotta Army: a terracotta collection of 8.000 soldiers and 520 horses, which belonged to the First Emperor of China, in the Emperor Qin Shi Huang's mausoleum (246 to 208 BCE). Only much later in 1974 it was discovered by local Chinese farmers.

Next to that, the beautiful red/orange color is also being used on houses. It's good to know Leadax Flashing is available in this great color as well.


Copper is a beautiful colour. That's it.

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 high-tack sealant (MS polymer)

High performance, strong adhesive sealant with an MS Polymer-base and a very high initial adhesion. It forms a durable bond to tiles, slates, mortar, and brickwork. Ideal for Leadax Easy SA and Leadax Original overlaps.

Leadax fixing clips

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

Leadax lead dresser

With the lead dresser you can easily mould Leadax Flashing. Designed in such a way so that the users have enough clearance around their knuckles when hammering.


Circular waterproofing materials for the world of today