... .weather resistance and uv protection 3..sound insulation 4.fire-retardant 5.light weight Product SpecificationThickness1.5,1.8,2. ... Standard Width(mm)1200-2100Standard Length(mm)6000mm; no limited under 4mmSpecific Gravity(kg/cbm)1200Standard Colorsclear, blue, green, brown, ... 28dB, 6mm--29dB, 8mm--31dB, 10mm-32dB 12mm--34dB16)Fire retardant: B1 level in accordance with code of Gb8624 Applications:Day ...