Protective paint PASSIVE PURPLE® RETROFIT BRUSH

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Overview
Intelligent Membranes offers a product range specifically formulated for retrofit airtightness and vapour control in building envelopes. These solutions improve energy performance and indoor conditions for occupants while minimising installation waste.

Tested & Certified — worldwide

• French A+ indoor-air rating & Finnish M1 class — very low VOC emissions (EN 16516 / RTS)
• Passive House Institute Class A airtight — 0.02 m³/h·m² @ 50 Pa (EN 12114)
• Air barrier material — 0.02 L/s·m² at 75 Pa (ASTM E2178 · ICC-ES ESR-4715)
• Reaction to fire — Class A to ASTM E84; Euroclass C-s1,d0 to EN 13501-1 (B-s1,d0 with FRED)
• Watertight (EN 14891) & intelligent vapour control, Sd ~0.8–40 m (EN ISO 12572)
• Strong adhesion — steel 2.7, CLT 1.83, gypsum 1.6, brick 1.5 N/mm² (EN ISO 4624)
• 10/10 mould resistance (ASTM D3273); radon & methane barrier; EPD (EN 15804)
• ICC-ES ESR-4715, Passivhaus certified & BBA approved

Related Guides

• How to Retrofit Vapour Control Without the Mess
• My Builder Forgot the Vapour Control Layer? Here’s How to Fix It
• EnerPHit Explained – The Passivhaus Standard for Old Buildings

Additional product information
The Retrofit brush grade is the Passive Purple® liquid airtight membrane formulation designed for external retrofit airtightness and vapour control. It is brush-applied and supplied in a 5kg container, providing a flexible, gap-filling layer that adheres and impregnates common substrates for long-lasting airtight performance.

Caractéristiques / spécifications techniques

• Product Collection: Passive Purple
• Denomination / Model: Passive Purple® Retrofit Brush
• Colour: Purple
• Usage: External (retrofit airtightness & vapour control)
• Application: Brush applied
• Size: 5kg
• Airtightness: 0.02 m³/h·m² @ 50 Pa (Passive House Institute Class A)
• Air barrier performance: 0.02 L/s·m² at 75 Pa (ASTM E2178 / ICC-ES ESR-4715)
• Reaction to fire: Class A (ASTM E84); Euroclass C-s1,d0 (EN 13501-1) — B-s1,d0 when used with FRED
• Watertight: certified to EN 14891
• Vapour control: intelligent vapour control, Sd ~0.8–40 m (EN ISO 12572)
• Adhesion (EN ISO 4624): steel 2.7 N/mm²; CLT 1.83 N/mm²; gypsum 1.6 N/mm²; brick 1.5 N/mm²
• Mould resistance: 10/10 (ASTM D3273)
• Environmental / certification notes: French A+ / Finnish M1; EPD (EN 15804); ICC-ES ESR-4715; Passivhaus certified; BBA approved
• Price (excl. VAT): €100.95