Exhibit with us
*myarchiexpo  
English
  1. Building & Construction
  2. Insulation and sealing
  3. Plastic vapor barrier
  4. Intelligent Membranes
  • Products
  • Catalogs
  • News & Trends
  • Exhibitions

Polymer vapor barrier AIRTIGHT WHITE BRUSH
VOC-free liquidfor homefor wall

Polymer vapor barrier - AIRTIGHT WHITE BRUSH - Intelligent Membranes - VOC-free liquid / for home / for wall
Polymer vapor barrier - AIRTIGHT WHITE BRUSH - Intelligent Membranes - VOC-free liquid / for home / for wall
Polymer vapor barrier - AIRTIGHT WHITE BRUSH - Intelligent Membranes - VOC-free liquid / for home / for wall - image - 2
Polymer vapor barrier - AIRTIGHT WHITE BRUSH - Intelligent Membranes - VOC-free liquid / for home / for wall - image - 3
Polymer vapor barrier - AIRTIGHT WHITE BRUSH - Intelligent Membranes - VOC-free liquid / for home / for wall - image - 4
Add to favorites
Compare this product

Characteristics

Material
polymer
Specifications
VOC-free liquid
Application
for wall, for ceiling, for floor, for home

Description

Product overview
  • Passive Purple Airtight White Brush is a fibre-reinforced polymer emulsion applied by paintbrush to create a permanent liquid airtight vapour control membrane. Its smooth white finish is suitable for retrofits, detailing, and projects where the airtight layer is left exposed.


Key Features & Benefits
  • BBA Certified & Passivhaus Certified – guaranteed airtightness and durability.
  • M1 Class, VOC-Free – water-based, non-toxic, safe for installers and low emissions.
  • Fire Class C Rated – improved safety compared to membranes only rated Class E.
  • Exceptional airtightness – achieves 0.03 ACH, well beyond Passivhaus requirements.
  • Universal adhesion – bonds to concrete, brick, timber, plasterboard, OSB, steel and more.
  • Coverage efficiency – 1 kg covers 1 m²; a single operative can apply up to 300 m² per day.


Where to use Airtight White Brush
  • Floor, wall and ceiling junctions
  • Window and door reveals
  • Service penetrations (pipes, ducts, cables)
  • Small retrofit airtightness projects
  • Any area where a white airtight coating is required on show


Technical performance & certifications
  • 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)
  • 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)
  • Radon & methane barrier; EPD (EN 15804)
  • ICC-ES ESR-4715, Passivhaus certified & BBA approved


Application notes (summary)
  • Applied by brush (brush-applied formulation).
  • Can be used on damp surfaces and in tricky junctions where tapes and silicones may fail.
  • Common workflow for penetrations: fill void with foam, trim excess, then apply Airtight White Brush generously to create a seamless, flexible airtight seal.


Related documents
  • Technical Data Sheet (TDS)
  • Installation Guide
  • Safety Data Sheet (SDS)
  • BBA Certificate and various test reports


Technical specifications
  • Product collection: Passive Purple
  • Applied by: Brush
  • Colour: White
  • Size: 6.9kg
  • Coverage: 1 kg ≈ 1 m²
  • Typical achievable airtightness: 0.03 ACH (tested)
  • Air barrier performance: 0.02 L/s·m² at 75 Pa
  • Fire classification: BS Fire Class C | Euroclass C‑s1,d0 (EN 13501-1)
  • Emission class: French A+ / Finnish M1 (very low VOC)
  • Adhesion values: steel 2.7, CLT 1.83, gypsum 1.6, brick 1.5 N/mm²
  • Mould resistance: 10/10 (ASTM D3273)
  • Certifications: ICC-ES ESR-4715, Passivhaus certified, BBA approved, EPD

VIDEO

Other Intelligent Membranes products

Airtight White

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.