USB MICRO LIGHT is a 3 layer vapour barrier that is impermeable to water and air. Its top and bottom layers are made of non-woven polypropylene fabric which protect the middle low breathability polypropylene microporous film. The three layers are joined and heat welded together. The main feature of this particular vapour barrier is its light weight (120 g/m²) which makes it the ideal vapour barrier product for walls or for applying to ceilings or roofs working from inside the building, where tensile strength is not as important as light weight and ease of handling.
A multi-layered, heat welded UV stabilized vapour barrier in PP, USB Micro Light can be applied to both walls and roofs and guarantees impermeability to water and air as well allowing the measured passage of water vapour from the inside to the outside and vice versa.