Best current price£55.99from B&Q
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B&Q£55.99Visit shop - Passive Purple External Airtight Fire Rated Façade Waterproofing Membrane (5Kg)Purple BrushPurple
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The Passive Purple Airtight Liquid Vapour Control Membrane is a specialized, brush-applied solution designed for professional contractors and serious DIYers looking to achieve high-performance airtightness on building façades. Its primary benefit is the ability to bridge gaps and seal service penetrations with a flexible, weather-resistant barrier that remains vapour-open, though users must note that it requires careful surface preparation and specific weather conditions for optimal curing.
| Colour | Purple |
|---|---|
| Model Part Number | IM/00PPEB5 |
| Brand | B&Q |
While this variant is specified as 'External', the product's primary purpose is for airtightness and vapour control. Consult local building regulations or the manufacturer regarding specific internal usage.
Drying times vary based on ambient temperature and humidity; ensure the product is fully cured before exposing it to heavy rain or mechanical stress.
As long as the surface is clean, dry, and free from loose debris, a primer is typically not required, but surfaces should be tested for adhesion first.
The purple color is characteristic of the product and is intended to remain visible as a sign of proper application; it may be covered by exterior cladding or finishes.
This product is independently certified to Euroclass B-s1,d0 standards.
Applying in direct sunlight can cause the product to dry too rapidly, potentially leading to surface defects or reduced structural integrity.
The surface may have been too dusty during application or the layer was applied too thin. Ensure the surface is cleaned thoroughly and apply a thicker, more uniform coat.
The product was likely applied during rain or high humidity. Ensure application is performed under dry conditions and allowed sufficient time to cure.
To ensure maximum effectiveness, the surface must be entirely clean, dry, and free from loose dust or debris prior to application. Use a standard masonry or paint brush to apply the liquid membrane to the target area, ensuring the coat is even.
