PASSIVE PURPLE AIRTIGHT VAPOUR CONTROL MEMBRANE WHITE 10kg IM/00AW10Passive Purple Airtight White – Airtight Membrane. The world’s most airtight liquid vapour control membrane. BBA Certified and Passivhaus Certified Airtight Vapour Control Membrane. if you don’t have an airless sprayer but would still wish to install Airtight White yourself, don’t worry, It can also be roll applied . It may take a bit longer, but it gets the job done.Passivhaus certifiedM1 class, voc free (volatile organic compound)Radon barrierFire class cUp to 300m2 a day per operative0.03ach (air changes per hour)Adheres to any substrate

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