Passive Purple External Airtight Fire Rated Façade Waterproofing Membrane (5kg) - Brush

Key Features and Benefits:

Seals Joints and Gaps: The brush-applied Passive Purple External is designed to seal even the most challenging joints and gaps, ensuring complete weatherproofing and airtightness. The added fibers provide extra strength to span wider gaps and irregular surfaces, offering a durable and long-lasting seal.

Weatherproof Protection: Formulated for external use, this product provides a robust barrier against wind, rain, and other environmental elements. It ensures that the building envelope remains airtight while keeping moisture out, offering superior protection in all weather conditions.

Enhanced Airtightness: Like all Passive Purple products, this brush version maintains excellent airtightness, making it ideal for projects focused on energy efficiency and Passivhaus certification.

Brush-On Flexibility: The brushable formulation allows for easy application in difficult-to-reach areas and on complex surfaces, ensuring that every joint, crack, and gap is securely sealed. This makes it perfect for both new builds and retrofits.

Ideal for External Use: Designed for external walls, roofs, and other weather-exposed areas, the brush version of Passive Purple External ensures your building stays protected from the elements while maintaining a breathable, airtight seal.

Can Adhere to Any Form of Construction and includes:

– Insulation panels
– Concrete and brick walls
– Fibre cementboards
– Engineered wooden panels / osb panels

Directions of use:

• Remove salt efflorescence, dust, loose parts and standing water from the surface
• Apply on a closed surface; if necessary, fill holes and joints with a fast setting cement based product or polyurethane foam
• Apply Passive Purple External at T < 5°C (also substrate temperature)
• Application on humid surfaces is allowed, but remove standing water
• Do NOT add water or solvents
• Do NOT apply in full sunlight
• Do NOT apply during rain
• Clean tools with water after use

Usage:External
Applied By:Brush
Colour:Purple
Certification:BS Fire Class B

Technical Data Sheet (TDS)

Install Guide

Safety Data Sheet

At Intelligent Membranes, we help architects, contractors, retrofitters and self-builders achieve airtightness and waterproofing targets with liquid-applied systems. Our flagship airtight system, Passive Purple®, is airtight at all times yet breathable when the building fabric needs to release vapour — we call this intelligent breathability.

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