Passive Purple

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Passive Purple is a leading airtight liquid-applied vapour control membrane developed by Intelligent Membranes Ltd. It is exclusively distributed in the U.S. by Passiv Haus Supply and is designed to meet Passivhaus standards for ultra-low energy buildings. This VOC-free, water-based product forms a flexible, continuous airtight barrier suitable for various substrates, including concrete, masonry, and engineered wood. It can be applied using spray, roller, or brush techniques, ensuring permanent airtightness in multiple applications. The product enhances building efficiency by providing vapour control, damp proofing, waterproofing, and fire protection. It is available in several variants, including internal and external airtight paints, a retrofit option, and a radon gas barrier. Passive Purple supports net-zero building standards and is suitable for commercial, self-build, and heritage projects. Passiv Haus Supply also offers professional installation services and expert advice to ensure optimal use of the product in various applications.