Verified by manufacturer 6 months ago
BBA Agrément Certificate
Certificate type
EPD
Certificate type
Constructionline Gold
Certificate type
ISO 9001 Quality Management
Certificate type
QA Certificate
Certificate type
Passivhaus
Certificate type
Spray/ roll applied airtight vapour control membrane (AVCM) forms a permanent, continuous, flexible airtight seal and vapour control on any substrate.
Passive Purple Airtight White – Airtight Membrane. The world’s most airtight liquid vapour control membrane. BBA Certified and Passivhaus Certified Airtight Vapour Control Membrane.
A polymer-based liquid which is applied with an airless spray device or roll applied and dries to form a permanent flexible airtight seal and vapour control layer. With excellent adhesion to most forms of construction substrates. Certified Airtightness of 0.03 ach on any substrate it is adhered to.
Passive Purple Airtight White adheres to any form of construction, allowing you to achieve maximum results for your desired goal. Once dry, Airtight White forms an extremely tough yet flexible polymer, water control membrane allowing it to move with the building settlement while also being super effective against impact damage. Airtight White, airtight membrane eliminates the inevitable rips, tears, unstuck tapes, staple holes, and many repairs you would expect to find on the classic paper membranes.
We have eradicated the need for paper, tapes and staples through this product, which eliminates all the problems that came with it (labour time, large quantity of damage repairs and waste material).
Airtight White is an airtight coating that is spray applied with an airless spray device. It is designed to cover all areas of an external envelope (warm side of the insulation) of a building, including difficult connections in floors, walls, roofs and joist areas. As long as Airtight White is used on the warm side of the insulation, it can be applied to either face of the external envelope.
The surface material where you apply Airtight White needs to be dust-free, solid and closed before starting the application. A closed surface implies that holes and joints need to be closed beforehand. Large holes and joints (> 5mm) can be closed with fast setting cement-based products or polyurethane foam. Small holes and joints (2-5mm) can be closed with Airtight White Liquid Brush. This is a much thicker (paintbrush applied version of Airtight White).
After these preparations, Airtight White radon barrier membrane can be sprayed with an airless paint spray device. This fast application method allows a single operative to apply up to 300 m² per day.
The wall/ceiling connections also need to be made airtight, especially when the connections are made of two different types of construction materials such as red brick/concrete or steel/concrete. Different construction materials react differently to changes in humidity and temperature, moving at different rates, which can lead to small cracks in plaster or another type of finishing. That movement can create air leaks that cause your building’s energy performance to suffer and potentially open the gateway for damp and mould to appear.
Both products can be used for these wall/ceiling connections: Airtight White vapour control membrane can be applied with an airless paint spray device. Or Airtight White Brush can be applied by brush. If you don’t have an airless sprayer but would still wish to install Airtight White yourself, don’t worry, we have a roller version for you. It may take a bit longer, but it gets the job done.
Pipe and wire penetrations can be the downfall of any air tightness testing. Airtight White and Airtight White Brush are applied around objects that penetrate any surface to the external envelope, sealing where most tapes and membranes fail.
Before you apply Airtight White or Airtight White Brush, first apply polyurethane foam around any penetrations. After hardening, remove the excess foam and apply a generous amount of Airtight White Brush with a flat paintbrush. In all cases, apply a sufficient, well-covering layer to guarantee airtightness and a strong radon barrier and vapour control membrane.
Airtight White can be applied (and is tested) on different construction materials such as concrete, brick, wood, PVC, aluminium and polyurethane foam. With a coat of Airtight White, the whole window/door reveal can be made airtight.
Working method: cut off the excess polyurethane foam, and apply Airtight White Brush.
Features and benefits:
Technical characteristics:
- Adhesion (to ISO 4624):
Color | White |
Finish | Other |
Material | Polymer |
Shape | Formless |
Length | Bespoke |
Width | Bespoke |
Height | Bespoke |
Warranty description | Lifetime |
Uniclass | |
CAWS | J41/395 Air and vapour control layer J42/395 Air and vapour control layer J21/395 Air and vapour control layer J31/330 Air and vapour control layer H30/261 Air and vapour control membrane H31/261 Air and vapour control membrane H11/785 Air and vapour control layer P10/60 Air and vapour control layer P10/310 Air and vapour control layer H30/30 Air and vapour control membrane H92/780 Air and vapour control layer |
Product range |
Material | Polymer. |
Purpose | Airtight vapour control membrane. |
Standard | Manufacturer guidanceManufacturer's standard. |
Performance characteristics | |
Tensile strength (minimum) | 42 N/50 mm². |
Tear resistance | To EOTA TR008, no cracking or delamination |
Elongation to break | 350.5% and 325.2%.Guidance for specification option: Average and average after ageing respectively. To BS EN ISO 527-3. |
Resistant to underground gases | Radon diffusion coefficient (to K124/02/95): 3.3 x 10^-12.Guidance for specification option: See Passive Purple Radon Certificate (linked) for further details. |
Water vapour resistance (minimum) | EN ISO 12572 20–35 m (0.3–0.5 mm resistance factor (2001) dry film thickness) (*) calculated value based on µ: 76000.G-value: 100 MN·s/g. (0.3–0.5 mm dry film thickness)G-value humidity variable: 4 MN·s/g |
Fire performance | To BS EN 13501-1, class C-s1,d0. |
UV stabilization | Manufacturer guidanceConsult manufacturer. |
Anti-static properties | Required. |
Third-party certification | British Board of Agrément (BBA) and Passivhaus certified.Manufacturer guidanceManufacturer's standard. |
Form | Liquid. |
Root inhibitor | Manufacturer guidanceConsult manufacturer. |
Physical properties | |
Colour | White. |
Weight (minimum) | 10 kg.Guidance for specification option: Per tub/ unit. |
Dimensions | |
Thickness (minimum) | 0.5–1 kg/m².Guidance for specification option: (500-1000 µm) 0.5–1 mm. |
Width (minimum) | 8–13 m².Guidance for specification option: Average. |
Roll length (minimum) | 8–13 m².Guidance for specification option: Average. |
Recycled content | 0%. |
Density | 1.2 kg/L. |
Contains Red List materials | No |
Country of material origin | Europe |
Country of product manufacture | Europe |
Recyclability | Not recyclable due to its adhesion to other products |
Recycled contentAs defined in clause 7.8 of BS EN ISO 14021 | 0 % Guidance for specification option: Consult manufacturer. |
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