Passive Purple: The World's Leading Airtight Liquid Vapour Control

In the realm of modern construction, airtightness and vapour control are paramount for achieving energy efficiency and maintaining healthy indoor environments. At Intelligent Membranes, we are proud to introduce Passive Purple, the world's leading airtight liquid vapour control solution that sets a new standard for performance, versatility, and sustainability.

What is Passive Purple?

Passive Purple is an innovative liquid-applied membrane designed to create a seamless and airtight barrier. It prevents air leakage, reduces drafts, and controls moisture, significantly contributing to the energy efficiency of buildings. This advanced product is ideal for both new construction and retrofit projects, delivering exceptional airtightness without compromising on breathability.

Key Benefits of Passive Purple

World-Class Airtightness: Passive Purple is engineered to achieve exceptional levels of airtightness, helping buildings meet stringent energy efficiency standards, including Passive House certification. Minimising air leaks, it reduces energy consumption and helps maintain a consistent indoor temperature.
Effective Vapour Control: While providing airtightness, Passive Purple also controls vapour transmission, preventing condensation and reducing the risk of mould and mildew. This balance of airtightness and vapour control ensures a healthier and more comfortable indoor environment.
Seamless Application: As a liquid-applied membrane, Passive Purple creates a seamless barrier that eliminates gaps and reduces the risk of leaks. Its unique formulation allows for easy application on a variety of substrates, including concrete, wood, and masonry.
Versatile Use: Passive Purple is suitable for various construction types, from residential to commercial, and from new builds to heritage restorations. Its adaptability makes it a versatile choice for any project requiring airtightness and vapour control.
Eco-Friendly and Sustainable: Developed with sustainability in mind, Passive Purple is low in volatile organic compounds (VOCs), ensuring minimal environmental impact. It contributes to a reduction in carbon footprint and supports eco-friendly building practices.
Durable and Long-Lasting: Passive Purple offers excellent durability, withstanding weather, UV exposure, and temperature fluctuations. This long-lasting protection ensures the integrity and energy efficiency of your building for years to come.

Why Choose Passive Purple?

Passive Purple is the ultimate solution for those seeking to achieve airtightness and vapour control in their construction projects. Its seamless application, versatility, and eco-friendly attributes make it the preferred choice for architects, builders, and contractors worldwide.

Explore more about Passive Purple and other groundbreaking products at Intelligent Membranes. We're committed to providing innovative solutions that drive energy efficiency, sustainability, and comfort in every building. Let us help you create airtight structures that meet the highest standards of performance and durability.

A BBA-certified, Passivhaus Certified, ICC Certified airtight vapour control air barrier coating that is applied with an airless spray device on all areas of an external envelope (warm side of the insulation) of a building. This includes those difficult connection areas to the floor, wall, roof and joist. When used on the warm side of the insulation, it can be applied to either face of the external envelope. To install, ensure the material or surface is dust-free.

Features and benefits:

The product is ready to use.
Fluid applied
Air barrier
Vapour control
Radon barrier
Memthane barrier
Volatile organic content (VOC), carcinogenic, ammonia and formaldehyde-free.
British Board of Agrément (BBA) and PASSIVHAUS certified.
A Passivhaus certified score of 0.03 ACH which is 20x lower than the required 0.6 air changes per hour (ACH).
Can guarantee a score of 0.6 ACH.
A single installer can apply up to 300 m² of Passive Purple a day using an airless spray device. Construction is sped up, and labour costs are dramatically reduced with this easy airtight pain.
M1 class.
Passive Purple is a fully BBA-certified Liquid Airtight Vapour Control Layer.
Passive Purple offers a Radon Barrier to eliminate radon gases entering your building.
A single installer can apply up to 300 m² of Passive Purple a day using an airless spray device. This speeds up the construction time and dramatically cuts labour costs.
Passive Purple airtight vapour control is a certified Passivhaus component.
Passive Purple is an M1 class, VOC-free water-based product. Zero nasty chemicals make it friendly for the user and the environment.
Passive Purple is rated Fire Class C, unlike paper membranes which are rated Fire Class E.
With a Passivhaus certified score of 0.03ach (20x lower than the required 0.6ach) Passive Purple can guarantee you a score of 0.6ach (air changes per hour) and under.

Technical characteristics:

Airtightness floor/ wall after ageing (NBN EN 12114 Eurocode 7): 0.05 M³/H.M (50 bar) (V).
Damp diffusion resistance factor (to EN ISO 12572): 20–35 m (0.3–0.5 mm dry film thickness). Calculated value based on m: 76 000.
Sd value humidity variable (to EN ISO 12572): 0.8–40 m.
G-value (to EN ISO 12572): 100–1175 MN×s/g. (0.3–0.5 mm dry film thickness). Calculated value based on m: 76 000.
G-value humidity variable (to EN ISO 12572): 4–200 MN·s/g.
Resistance to fatigue movement (to EOTA TR008): No cracking or delamination.
Methane permeability (to IOS 15105): 62–75 cm³ (STP, mm·m²/day·atm).
Radon diffusion coefficient (to K124/0295): 3.3 x 10^-12.

- Adhesion (to ISO 4624):

Red brick: 1.5 N/mm² (dry), 1.4 N/mm² (moist).
Concrete: 1.9 N/mm² (v) (dry), 1.6 N/mm² (v) (moist).
Ytong block: Adhesion value exceeding substrate strength, 0.7–0.8 N/mm².
Gypsum block (Isolava): 1.6 N/mm².
Orient strand board (OSB) wood (to ISO 4624): Adhesion value exceeding substrate strength, 0.6 N/mm².
Multiplex wood: Adhesion value exceeding substrate strength, 0.6 N/mm².
Steel: 2.7 N/mm².
Ethylene propylene diene monomer (EPDM) rubber ISO 4624 (Tridex): Adhesion value exceeding substrate strength, 0.7 N/mm².
Roofing: Adhesion value exceeding substrate strength, 0.7 N/mm².
Plaster (Knauf MP75) on PASSIVE PURPLE: Adhesion value exceeding substrate strength, 0.4 N/mm².
Thin plaster (ALLTEC) on PASSIVE PURPLE: 0.8 N/mm² (v).

Also classed as a radon barrier protection.

Environmental Product Declaration