... duration,easy to install,rich color,beautiful appearance. 3)25-300 1.fireproof2.heat preservation3.sound isolation4.light and duration4.easy ... of the sandwich panel as below:Thinckness:50-150mmDensity of EPS:6kg/m3-15kg/m3double steel sheet thickness:0.3-0 ... (cap type, lap joint (over lap)type)4, core material: EPS, ROCK WOOL,GLASS ROCK, PU MATERIAL AND SO ON 50mm ...