Properties test data unit Thickness 4-10 mm Reflectivity 96-97 % 246weight 256 g/m Water vapour Transmission 0.012 g/m Emissivity 0.03-0.04 coef Corrosion no Thermal Conductivity 0.035 w/m0 Tensile strength (md) 0.77 mpa Apparent density 123 kg/m Tensile strength (td) 1.43 mpa