{"product_id":"technoelast-vb-600-vapour-control-layer-40m-x-1m","title":"Wonderbuilds SA VB 600 Vapour Control Layer 40m x 1m","description":"WONDERBUILDS SA VB 600 is a high-performance, self-adhesive vapour control layer (VCL) designed to protect warm roof systems from moisture build-up. Made from reinforced SBS-modified bitumen, it’s flexible, durable, and perfect for areas with high humidity or temperature fluctuations—such as swimming pools, gyms, factories, and commercial spaces.\n\nIts top layer is faced with reflective aluminium foil for enhanced thermal performance and durability, while the underside features an easy-to-remove siliconised film, making application quick and straightforward without the need for flames or torches.\n\nVB 600 is suitable for a variety of deck types, including profiled metal sheets and plywood, and offers excellent resistance to mechanical damage during installation. It stays flexible in cold conditions (down to -25°C), making it suitable for year-round use.\n\nTo ensure a fully bonded, effective vapour barrier, it must be used with WonderBuilds SA Primer, which creates a secure bond to all approved substrates and detailing areas.\n\n\u003ch3\u003eKey Features\u003c\/h3\u003e\nSelf-adhesive application – no flames or torches needed\n\nReinforced SBS-modified bitumen – strong and flexible\n\nTop surface: aluminium foil for thermal resistance\n\nUnderside: peel-off silicon film for clean installation\n\nExcellent mechanical strength\n\nLow temperature flexibility: effective down to -25°C\n\nEasy to install and repair\n\nIdeal for high-moisture environments\n\n\u003ch3\u003eFAQs – WonderBuilds SA VB 600 VCL\u003c\/h3\u003e\n\u003ch4\u003eDo I need to use a primer with this product?\u003c\/h4\u003e\nYes, WonderBuilds SA Primer must be used with VB 600. It ensures a full, secure bond to the substrate and is critical to the system’s performance and long-term reliability.\n\n\u003ch4\u003eIs this suitable for use on metal and timber decks?\u003c\/h4\u003e\nAbsolutely. VB 600 is designed for both profiled metal decking and plywood\/timber surfaces, offering strong adhesion and flexibility on a variety of roof types.\n\n\u003ch4\u003eCan I install this in cold weather?\u003c\/h4\u003e\nYes, the VB 600 remains flexible in temperatures as low as -25°C, so it can be safely and effectively applied during colder months.\u003cbr\u003e\u003cp\u003eCheck out our full range of \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/roofing-supplies\"\u003eroofing supplies\u003c\/a\u003e.\u003c\/p\u003e\u003cp\u003eBrowse more \u003ca href=\"https:\/\/jjbuildingmaterials.co.uk\/collections\/roofing-felt\"\u003eroofing felt\u003c\/a\u003e available online.\u003c\/p\u003e","brand":"Wonderbuilds","offers":[{"title":"Default Title","offer_id":50536055046486,"sku":"74415","price":196.98,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0905\/4509\/4998\/files\/wonderbuilds-sa-vb-600-vapour-control-layer-40m-x-1m-9391678.jpg?v=1772662512","url":"https:\/\/jjbuildingmaterials.co.uk\/products\/technoelast-vb-600-vapour-control-layer-40m-x-1m","provider":"JJ Building Materials","version":"1.0","type":"link"}