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B&Q£119.99Visit shop - Passive Purple External Airtight Fire Rated Façade Waterproofing Membrane (10Kg)Spray / RollerPurple
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The Passive Purple Airtight Liquid Vapour Control Membrane is a high-performance, water-based solution designed for builders, contractors, and DIY enthusiasts aiming to achieve Passivhaus-standard airtightness in new builds or renovations. It excels at sealing complex junctions and gaps in insulation, timber, steel, and masonry to maximize thermal efficiency; however, users should note that as a liquid-applied product, it requires careful preparation of the substrate to ensure proper adhesion and performance.
| Model Part Number | IM/00PPB6.9 |
|---|---|
| Brand | Intelligent Membranes |
Yes, it is certified to perform effectively as a Radon barrier.
It can be left as is, or painted/plastered over once fully cured.
One 10kg tub covers approximately 8-18m2 depending on the porosity of the substrate.
Yes, it is M1 class and VOC-free, meaning it does not emit harmful chemicals into the living space.
Yes, it is designed to bond to various insulation materials to create an airtight seal.
Ensure the substrate is free from dust, grease, and loose particles before application.
Usually caused by applying too thick of a layer in one pass; apply in thinner, more consistent coats.
Ensure the product is stored at room temperature; cold temperatures can thicken the consistency.
Before application, ensure all surfaces are clean, dry, and free of loose debris or dust. The product is applied using a brush or roller; for larger commercial projects, consider the spray-version counterpart.
Compatibility: Compatible with all standard building materials including OSB, concrete, steel, and insulation boards.
Care: Once cured, the membrane is robust. If the surface is accidentally punctured during later construction phases, it can be easily repaired by applying a fresh layer of the liquid over the damaged area to maintain the seal.
