Passive Purple Brush - Handy Pack (3.7kg) - Vapour Control Paint - Brush Applied

What is Passive Purple? Passive Purple brush liquid airtight vapour control membrane is an airtight coating applied with a 3 inch application brush on all areas of the external envelope (warm side of the insulation) of a building. This includes difficult connection areas such as floors, walls, roofs, and joists. When Passive Purple is used on the warm side of the insulation, it can be applied to either face of the external envelope. To install Passive Purple, ensure the surface is solid, dust-free, and closed before application. A closed surface means all holes and joints must be sealed beforehand: Large holes and joints (>5mm): seal with fast-setting cement-based products or polyurethane foam. Small holes and joints (2–5mm): seal directly using Passive Purple Liquid Brush, the thicker brush-applied version. For small projects such as private houses, Passive Purple Brush can be applied using a flat paintbrush. Wall and ceiling connections must also be made airtight, particularly where different construction materials meet (e.g. brick to concrete or steel to concrete). Different construction materials react differently to changes in humidity and temperature, which can cause small cracks in finishes. These cracks can lead to air leakage, reduced energy performance, and the risk of damp and mould. 🌎 Tested for World Markets — ASTM (US) & EN (Europe) Passive Purple Brush is tested and certified for international projects: ICC-ES ESR-4715 code recognition in the United States and ASTM E84 Class A (Flame Spread 0, Smoke Developed 35) sit alongside its European (EN) certifications, so the same liquid airtight membrane can be specified in the UK, Europe and North America. US architects & specifiers: download the US specifications (CSI MasterFormat) US supply & install: WickRight, our Chicago distribution & installation partner Full test data: Passive Purple — Tested & Certified Quality assurance: Download the free Installation & QA Record sign-off sheet (IM-QA-02) for this product.