Aluminium Foil Bubble Insulation Superfoil Double Bubble Foil Roll • Fully Certified for Wall application • Meets NHBC Standards • Able to achieve U-Values of 0.27 • New Build & Refurbishment • CFC/HCFC Free Airtec is a multi-layer air bubble film insulation with aluminium bonded to both faces. The aluminium is coated to give durability and corrosion resistance therefore creating a fully waterproof insulation system. SFBA 2/2 is a high performance insulation material which acts by trapping air within its structure creating low emissivity air spaces which enhance its total thermal capabilities.