A BBA-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.

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