Leak-proofing paint PASSIVE PURPLE RETROFIT

protectiveindooroutdoor

Product overview
Here at Intelligent Membranes, we have a range specifically for retrofitting airtightness and vapour control. The Retrofit Airtightness Spray (Passive Purple Retrofit) is designed for vapour control and energy efficiency, ideal for retrofitting projects. As a liquid membrane it adheres to the surface it is applied to, impregnating and creating an airtight substrate that fills holes, cracks, penetration leaks and problem areas. The formulation is environmentally friendly and delivers certified performance standards.

Passive Purple Retrofit — key benefits

• Liquid-applied airtight membrane that adheres and impregnates substrates, reducing damage risk compared with paper membranes
• Designed for retrofit airtightness and vapour control to improve energy efficiency and internal environment
• Application by spray or roller (spray/roller product)

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 when used with FRED)
• Watertight (EN 14891) & intelligent vapour control, Sd ≈ 0.8–40 m (EN ISO 12572)
• Strong adhesion: steel 2.7 N/mm², CLT 1.83 N/mm², gypsum 1.6 N/mm², brick 1.5 N/mm² (EN ISO 4624)
• 10/10 mould resistance (ASTM D3273)
• Provides radon & methane barrier performance
• EPD (EN 15804) declared product; 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

Quality assurance
Installation & QA sign-off record (installation & QA record sign-off sheet) is available for this product as part of quality assurance procedures.

Caractéristiques / spécifications techniques

• Product collection: Passive Purple
• Denomination commerciale (model/series): Passive Purple Retrofit
• Colour: Purple
• Usage: External (also suitable for retrofit internal applications as described)
• Application: Spray / Roller
• Sizes: 10 kg
• Passive House airtightness: 0.02 m³/h·m² @ 50 Pa (EN 12114)
• Air barrier: 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)
• Watertight standard: EN 14891
• Vapour control (intelligent breathability): 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: ASTM D3273 – 10/10
• Radon & methane barrier capability
• Environmental declaration: EPD (EN 15804)
• Certifications: ICC-ES ESR-4715, Passivhaus certified, BBA approved