Passive Purple Airtight White Brush Applied Vapour Control Membrane Paint 6.9kg Intelligent Membranes

Passive Purple Airtight White Brush is a thick, fibre-reinforced airtight and vapour-control membrane, specially formulated for brush application to corners, joints and service penetrations. As the brush-applied version of the Airtight White range, it offers precise control for sealing connections and fixing holes. Its putty-like consistency allows it to bridge gaps of up to 5mm, forming an airtight barrier that significantly reduces air leakage (0.03 ACH).Free from harmful fumes, the Airtight White Brush forms a tough, flexible polymer membrane that moves with the building, resists mould and fungi, all whilst providing long-lasting airtightness. Perfect for retrofits, detailing, and smaller projects.Features & Benefits: Passive Purple Airtight White Brush Applied Vapour Control Membrane Paint - 6.9kg, Brush-applied, fibre-reinforced airtight vapour-control membrane, VOC-free, water-based, mould & fungi resistant, Ideal for sealing joints, corners & penetrations before spray or roller coatCoverage, Approx 1m per 1kgStandards & Certification, BBA Certified, Passivhaus Certified, Fire Class C Rated. Passive Purple Airtight White Brush Applied Vapour Control Membrane Paint - 6.9kg Intelligent Membranes

The brush grade in white - a thicker, fibre-reinforced airtight membrane applied with a flat paintbrush, so no airless sprayer is needed. Around 1kg covers 1m2. Built for the awkward details - seals around service penetrations, joist ends, window and door reveals, corner junctions and wall-to-floor and wall-to-ceiling connections. White finish that can be left or decorated - plaster or paint straight over it with no colour reading through the finish. Stays stuck - dries to a tough, flexible airtight film that moves with building settlement instead of peeling or lifting like silicone and tape. Right size for one house - the 6.9kg home pack suits self-builders, extensions and retrofit work, on its own or as prep before spraying Airtight White over the top. Water based and VOC free - no solvents and no fumes, and the brush washes out with water. BBA and Passivhaus certified, made in the UK.