... KYNAR-500resin coating process,results in an effective barrier against corrosion,alkali,UV,sunlight,humidify,salf,tropical ... weather climates in addition to it's effective barrier against external factors,it does it without fading ... foam material,as insulation will optimize the decibel barrier,by using either fiberglass insulation or poly-foam ... 4MM PVDF COATED ALUMINIUM COMPOSITE PANEL ACP PLASTIC SHEET