... weather 3.sound insulation 4.easy installation 5.flame rensistance Polycarbonate sheet for building features of prouducts:Light transmission:the light ... for a long time.Sound insulation : the hollow from and polycarbonate resin offer significant advantage to the sound insulation.Weather ability ... ,greenhouse,flower greenhouse,gradens,hotel,departmentstore,hotel,stadium,skylight,walkways,awning,canopy.