{"title":"Airtight White","description":"\u003cp\u003e\u003ca href=\"\/it\/products\/airtight-white-membrane-paint\"\u003eAirtight White\u003c\/a\u003e is Passive Purple's brighter twin — the same liquid-applied airtight, vapour control and smoke tight membrane, in a white that's easy to decorate over and easy on the eye in exposed areas. Passivhaus certified, BBA approved, tested to both ASTM and EN standards (ICC-ES ESR-4715), and a tested radon and methane barrier. Choose the 11.4kg spray\/roller pail for big areas, the 6.9kg \u003ca href=\"\/it\/products\/white-airtight-vapour-control-paint-6-9kg\"\u003eHome Pack\u003c\/a\u003e for brush application, or the Brush Pack and Big Boy Bundle for kit-in-one ordering.\u003c\/p\u003e","products":[{"product_id":"airtight-white-membrane-paint","title":"Airtight White - Vapour Control, Airtight \u0026 Smoke Tight Paint (11.4kg) - Spray \/ Roller Applied","description":"\u003ch2 data-start=\"93\" data-end=\"127\"\u003ePassive Purple Airtight White\u003c\/h2\u003e\n\u003cp data-start=\"128\" data-end=\"180\"\u003e\u003cstrong data-start=\"128\" data-end=\"180\"\u003eVOC-Free Airtight, Vapour \u0026amp; Gas Control Membrane\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp data-start=\"182\" data-end=\"389\"\u003ePassive Purple Airtight White is a \u003cstrong data-start=\"217\" data-end=\"260\"\u003eVOC-free, water-based airtight membrane\u003c\/strong\u003e providing reliable \u003cstrong data-start=\"280\" data-end=\"298\"\u003evapour control\u003c\/strong\u003e and protection against \u003cstrong data-start=\"322\" data-end=\"349\"\u003eradon and methane gases\u003c\/strong\u003e — without any nasty chemicals or fumes.\u003c\/p\u003e\n\u003cp data-start=\"391\" data-end=\"687\"\u003eIdeal for those on-site “oops” moments, it can be applied directly onto \u003cstrong data-start=\"463\" data-end=\"479\"\u003eplasterboard\u003c\/strong\u003e if a vapour control layer has been missed. When used with \u003cstrong data-start=\"538\" data-end=\"551\"\u003eIM Primer\u003c\/strong\u003e, it can be \u003cstrong data-start=\"563\" data-end=\"595\"\u003eleft on show or painted over\u003c\/strong\u003e, making it perfect for exposed environments such as \u003cstrong data-start=\"648\" data-end=\"686\"\u003ecar parks, museums, and stairwells\u003c\/strong\u003e.\u003c\/p\u003e\n\u003cp data-start=\"689\" data-end=\"910\"\u003eOnce dry, it forms a \u003cstrong data-start=\"710\" data-end=\"749\"\u003etough yet flexible polymer membrane\u003c\/strong\u003e that moves with the building and resists impact damage — eliminating the rips, tears, staple holes and failed tapes associated with traditional paper membranes.\u003c\/p\u003e\n\u003cp data-start=\"912\" data-end=\"954\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eLess labour. Less waste. More performance.\u003c\/p\u003e\n\u003cp data-start=\"912\" data-end=\"954\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eCheck out our \u003ca href=\"https:\/\/intelligentmembranes.aflip.in\/80f3ef4f93.html\" target=\"_blank\" title=\"Retrofit Vapour control \" rel=\"noopener\"\u003ecase study \u003c\/a\u003e\u003c\/p\u003e\n\u003cdiv style=\"border-top:2px solid #b5985a;margin-top:28px;padding-top:18px;\"\u003e\n\u003ch2 style=\"color:#4a1a6e;\"\u003eTested \u0026amp; Certified — worldwide\u003c\/h2\u003e\n\u003cp\u003eAirtight White is the white-pigmented version of Passive Purple — the same liquid airtight membrane formulation — independently tested to \u003cstrong\u003eboth ASTM (ICC-ES) and EN standards\u003c\/strong\u003e, so it can be specified worldwide:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e🔒 \u003cstrong\u003eAir barrier material\u003c\/strong\u003e — 0.02 L\/s·m² at 75 Pa (ASTM E2178)\u003c\/li\u003e\n\u003cli\u003e🔥 \u003cstrong\u003eReaction to fire\u003c\/strong\u003e — Class A to ASTM E84 (Flame Spread 0); Euroclass C to EN 13501-1\u003c\/li\u003e\n\u003cli\u003e☀️ \u003cstrong\u003eHigh solar reflectance\u003c\/strong\u003e — the white finish reflects even more solar energy (the purple grade is independently rated SRI 52, ASTM E1980)\u003c\/li\u003e\n\u003cli\u003e🛡️ \u003cstrong\u003eRadon barrier\u003c\/strong\u003e — diffusion coefficient 3.3 × 10⁻¹² m²\/s (ISO\/TS 11665-13)\u003c\/li\u003e\n\u003cli\u003e💨 \u003cstrong\u003eMethane \/ ground-gas barrier\u003c\/strong\u003e — low permeability (ISO 15105)\u003c\/li\u003e\n\u003cli\u003e🧱 \u003cstrong\u003eStrong adhesion across substrates\u003c\/strong\u003e — CLT, OSB, masonry, gypsum \u0026amp; steel (EN ISO 4624)\u003c\/li\u003e\n\u003cli\u003e🦠 \u003cstrong\u003e10\/10 mould resistance\u003c\/strong\u003e — no defacement (ASTM D3273)\u003c\/li\u003e\n\u003cli\u003e♻️ \u003cstrong\u003eEnvironmental Product Declaration\u003c\/strong\u003e (EN 15804)\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eICC-ES ESR-4715\u003c\/strong\u003e, Passivhaus certified \u0026amp; BBA approved\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003ca href=\"\/it\/pages\/passive-purple-tested-certified\" title=\"Passive Purple \u0026amp; Airtight White Tested \u0026amp; Certified\"\u003eSee all test data \u0026amp; certifications →\u003c\/a\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv style=\"border-top:2px solid #b5985a;margin-top:28px;padding-top:18px;\"\u003e\n\u003ch2 style=\"color:#4a1a6e;\"\u003eRelated Guides\u003c\/h2\u003e\n\u003cp\u003eHelpful guides related to this product:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/it\/pages\/passive-purple-tested-certified\" title=\"Tested \u0026amp; Certified\"\u003ePassive Purple \u0026amp; Airtight White: Tested \u0026amp; Certified (ASTM \u0026amp; EN data)\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/pages\/liquid-airtight-membranes-vs-parge-coating\" title=\"Liquid Airtight Membranes vs Parge Coating\"\u003eLiquid Airtight Membranes vs Parge Coating\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/what-is-a-vapour-control-layer-vcl-explained\" title=\"What Is a Vapour Control Layer? | VCL Explained\"\u003eWhat Is a Vapour Control Layer? | VCL Explained\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/builder-forgot-the-vapour-control-layer-how-to-fix-it\" title=\"My Builder Forgot the Vapour Control Layer? Here’s How to Fix It\"\u003eMy Builder Forgot the Vapour Control Layer? Here’s How to Fix It\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/how-to-retrofit-vapour-control-without-the-mess-bba-approved-passivhaus-certified-building-control-ready\" title=\"How to Retrofit Vapour Control Without the Mess\"\u003eHow to Retrofit Vapour Control Without the Mess\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/case-study\/reuben-college-oxford-award-winning-airtight-basement-solution-using-airtight-white\" title=\"Reuben College, Oxford\"\u003eReuben College, Oxford – Award-Winning Airtight Basement with Airtight White\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":52608799965524,"sku":"IM\/00AW11.4","price":99.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/2104\/7636\/files\/Airtight-White.png?v=1758025945"},{"product_id":"airtight-white-bundle","title":"Airtight White Big Boy Bundle","description":"\u003cp\u003eThe \u003cstrong\u003eAirtight White Big Boy Bundle\u003c\/strong\u003e brings together our VOC-free, water-based \u003cstrong\u003eAirtight White\u003c\/strong\u003e vapour control membrane in one convenient pack — everything you need to create a continuous, paintable airtight and vapour control layer across walls, floors and ceilings. Ideal for new build and retrofit projects, including areas where the airtight layer is left on show.\u003c\/p\u003e\n\u003cdiv style=\"border-top:2px solid #b5985a;margin-top:28px;padding-top:18px;\"\u003e\n\u003ch2 style=\"color:#4a1a6e;\"\u003eRelated Guides\u003c\/h2\u003e\n\u003cp\u003eHelpful guides related to this product:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/what-is-a-vapour-control-layer-vcl-explained\" title=\"What Is a Vapour Control Layer? | VCL Explained\"\u003eWhat Is a Vapour Control Layer? | VCL Explained\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/builder-forgot-the-vapour-control-layer-how-to-fix-it\" title=\"My Builder Forgot the Vapour Control Layer? Here’s How to Fix It\"\u003eMy Builder Forgot the Vapour Control Layer? Here’s How to Fix It\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/educational\/what-is-airtightness-and-why-it-matters-for-net-zero-buildings\" title=\"What is Airtightness (and Why It Matters for Net Zero Buildings)\"\u003eWhat is Airtightness (and Why It Matters for Net Zero Buildings)\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":52608800063828,"sku":null,"price":564.93,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/2104\/7636\/files\/Airtight-White-Bundle-1.png?v=1758025946"},{"product_id":"white-airtight-vapour-control-paint-6-9kg","title":"Airtight White Brush - Home Pack (6.9kg) - Vapour Control Paint - Brush Applied","description":"\u003cp\u003e\u003cstrong\u003ePassive Purple Airtight White Brush\u003c\/strong\u003e is a \u003cstrong\u003efibre-reinforced polymer emulsion\u003c\/strong\u003e applied by paintbrush to create a \u003cstrong\u003epermanent liquid airtight vapour control membrane\u003c\/strong\u003e. Its smooth white finish makes it perfect for \u003cstrong\u003eretrofits, detailing, and projects where the airtight layer is left exposed\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch2\u003eKey Features \u0026amp; Benefits\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003e✅ \u003cstrong\u003eBBA Certified \u0026amp; Passivhaus Certified\u003c\/strong\u003e – guaranteed airtightness and durability you can trust\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eM1 Class, VOC-Free\u003c\/strong\u003e – water-based, non-toxic, and safe for installers and the environment\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eFire Class C Rated\u003c\/strong\u003e – safer than traditional membranes rated only Class E\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eExceptional Airtightness\u003c\/strong\u003e – achieves \u003cstrong\u003e0.03 ACH\u003c\/strong\u003e, far beyond the Passivhaus requirement of 0.6 ACH\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eUniversal Adhesion\u003c\/strong\u003e – bonds to concrete, brick, timber, plasterboard, OSB, steel, and more\u003c\/li\u003e\n\u003cli\u003e✅ \u003cstrong\u003eCoverage Efficiency\u003c\/strong\u003e – \u003cstrong\u003e1kg covers 1m²\u003c\/strong\u003e; one operative can apply up to \u003cstrong\u003e300m² per day\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eWhere to Use Airtight White Brush\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eFloor, wall, and ceiling junctions\u003c\/li\u003e\n\u003cli\u003eWindow and door reveals\u003c\/li\u003e\n\u003cli\u003eService penetrations (pipes, ducts, cables)\u003c\/li\u003e\n\u003cli\u003eSmall retrofit airtightness projects\u003c\/li\u003e\n\u003cli\u003eAny area where a \u003cstrong\u003ewhite airtight coating is required on show\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e👉 The \u003cstrong\u003e6.9kg Passive Purple Airtight White Brush\u003c\/strong\u003e is the \u003cstrong\u003efast, certified solution\u003c\/strong\u003e for creating airtight, durable, and visually clean airtight layers in both new builds and retrofit projects.\u003c\/p\u003e\n\u003cdiv style=\"border-top:2px solid #b5985a;margin-top:28px;padding-top:18px;\"\u003e\n\u003ch2 style=\"color:#4a1a6e;\"\u003eRelated Guides\u003c\/h2\u003e\n\u003cp\u003eHelpful guides related to this product:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/what-is-a-vapour-control-layer-vcl-explained\" title=\"What Is a Vapour Control Layer? | VCL Explained\"\u003eWhat Is a Vapour Control Layer? | VCL Explained\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/builder-forgot-the-vapour-control-layer-how-to-fix-it\" title=\"My Builder Forgot the Vapour Control Layer? Here’s How to Fix It\"\u003eMy Builder Forgot the Vapour Control Layer? Here’s How to Fix It\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/how-to-retrofit-vapour-control-without-the-mess-bba-approved-passivhaus-certified-building-control-ready\" title=\"How to Retrofit Vapour Control Without the Mess\"\u003eHow to Retrofit Vapour Control Without the Mess\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":52608800129364,"sku":"IM\/00AWB6.9","price":59.99,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/2104\/7636\/files\/Airtight-White-Brush_0f2adf53-4d8d-4abe-ace4-1ccb754800c0.png?v=1758025947"},{"product_id":"white-airtight-vapour-control-paint-5kg-brush-bundle","title":"Airtight White Brush Pack","description":"\u003cstrong\u003eProduct Collection: \u003c\/strong\u003ePassive Purple Edition\r\n\u003cstrong\u003eApplied By:\u003c\/strong\u003e Brush\r\n\u003cstrong\u003eColour:\u003c\/strong\u003e White\r\n\u003cstrong\u003eSize:\u003c\/strong\u003e 6.9kg\r\n\r\nPassive Purple Edition - Airtight White brush – High technology, fibre reinforced polymer emulsion applied with a paintbrush. Dries to form a permanent vapour control membrane.\r\n\r\n\u003cstrong\u003eBrush Applied.\u003c\/strong\u003e\r\n\r\n\u003cstrong\u003eKey Points:\u003c\/strong\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003eBBA certified\u003c\/li\u003e\r\n \t\u003cli\u003eM1 class, VOC free (volatile organic compound)\u003c\/li\u003e\r\n \t\u003cli\u003eRadon barrier\u003c\/li\u003e\r\n \t\u003cli\u003eFire class C\u003c\/li\u003e\r\n \t\u003cli\u003eUp to 300m2 a day per operative\u003c\/li\u003e\r\n \t\u003cli\u003e0.03ach (air changes per hour)\u003c\/li\u003e\r\n \t\u003cli\u003eAdheres to any substrate\u003c\/li\u003e\r\n \t\u003cli\u003e1kg will cover 1m2\u003c\/li\u003e\r\n\u003c\/ul\u003e\n\u003cdiv style=\"border-top:2px solid #b5985a;margin-top:28px;padding-top:18px;\"\u003e\n\u003ch2 style=\"color:#4a1a6e;\"\u003eRelated Guides\u003c\/h2\u003e\n\u003cp\u003eHelpful guides related to this product:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/what-is-a-vapour-control-layer-vcl-explained\" title=\"What Is a Vapour Control Layer? | VCL Explained\"\u003eWhat Is a Vapour Control Layer? | VCL Explained\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/builder-forgot-the-vapour-control-layer-how-to-fix-it\" title=\"My Builder Forgot the Vapour Control Layer? Here’s How to Fix It\"\u003eMy Builder Forgot the Vapour Control Layer? Here’s How to Fix It\u003c\/a\u003e\u003c\/li\u003e\n\u003cli\u003e\u003ca href=\"\/it\/blogs\/news\/how-to-retrofit-vapour-control-without-the-mess-bba-approved-passivhaus-certified-building-control-ready\" title=\"How to Retrofit Vapour Control Without the Mess\"\u003eHow to Retrofit Vapour Control Without the Mess\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e","brand":"My Store","offers":[{"title":"Default Title","offer_id":52608800162132,"sku":"IM\/00AWB10-1-1","price":64.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0984\/2104\/7636\/files\/Airtight-White-External-Brush-Bundle.png?v=1758025948"}],"url":"https:\/\/intelligentmembranes.com\/it\/collections\/airtight-white.oembed","provider":"Intelligent Membranes","version":"1.0","type":"link"}