... 2008 verified and SGS 4. 88% light transmssion polycarbonate skylight for building material Products profile A: Polycarbonate sheet is ... strength of pc sheet is 250_300 times of the ordinary glass. 6.sound insulation with good sound insulation effect, ... ,departmente,hotel,stadium,school ,amusement center ,hospital,etc.2. skylight,lighting for corridors ,balcony,passages and subway entries ,walkways.3 ...