Passive Purple External Airtight Fire Rated Façade Waterproofing Membrane (10kg) – Spray / Roller

Usage: External or Internal
Applied By: Roller or Spray
Colour: Purple, Black,Cream or White
Size: 10kg
Certification: BS Fire Class B | ASTM Fire Class A
Sample Available Here

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Our Fire Class B Liquid Applied Weather Barrier is an advanced protective solution designed to meet the highest standards of fire safety and energy efficiency. This versatile weather barrier is Passivhaus certified, ensuring airtightness and thermal performance, while also providing robust protection against external weather conditions.

Key Features and Benefits:

• Fire Class B Rated: Specifically designed with fire safety in mind, this weather barrier offers a Class B fire rating, providing enhanced resistance to flame spread and adding an extra layer of safety to your building projects.
• KIWA Approved: Approved as an intelligent moisture management membrane.
• Passivhaus Certified: This product is meticulously engineered to meet the stringent requirements of Passivhaus standards, ensuring optimal airtightness and energy efficiency. It’s ideal for creating sustainable, eco-friendly, and low-energy buildings.
• Liquid Applied for Seamless Coverage: Unlike traditional sheet barriers, our liquid applied membrane forms a seamless, continuous layer that conforms to any surface. This eliminates weak spots like seams and overlaps where air or moisture could penetrate.
• Weatherproof Protection: Designed to withstand harsh environmental conditions, it acts as a powerful barrier against wind, rain, and other external elements, ensuring the building envelope remains airtight and protected.
• Versatile Application: Suitable for a variety of substrates, including timber, steel, and concrete, this weather barrier can be applied to both new builds and retrofit projects, making it a flexible choice for a wide range of construction needs.

Why Choose This Weather Barrier?

• Energy Efficiency: Helps reduce energy consumption by minimizing air leakage, contributing to a more sustainable and cost-effective building.
• Fire Safety: Provides peace of mind with a certified fire safety rating, meeting the latest building regulations.
• Long-Lasting Durability: Offers long-term protection against weather and fire, ensuring your building remains safe and energy-efficient for years to come.

With its combination of fire safety, KIWA Approved, Passivhaus certification, and superior weatherproofing capabilities, our Fire Class B Liquid Applied Weather Barrier is the smart choice for those looking to build safe, sustainable, and high-performance structures.

Passive Purple External is a waterproof moisture management coating that helps with dampness and vapour. It is at Passivhaus level and is proven to achieve above the required levels of airtightness to meet building regulations. As an added bonus it is fire class B making it the ideal solution for any building project. It offers methane and anti carbonation protection.

It is the new and intelligent method of moisture management and is preferred to traditional paper membranes because of its fast drying and easy installation using spray and roller. It flexes when the building has movement and has no space inbetween the wall making the coverage fully protected. The fire protection increases safety, whereas traditional paper membranes burn like hell in the event of a fire. It is robust and does not tear.

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Tin Coverage
Masonry: 8m2
Timber: 13m2
Plasterboard: 15m2 per tub

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View on BIM Object

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Not just in purple. Browse our product spec for more colours.