... energy-saving EPS Sandwich wall PanelComposition: Calcium silicate board (face panel) + Cement and EPS (core) + Calcium silicate board (face panel) Weight- ... tightness to ASTM C1185No droplets observed behind the panel,Test 24 hours at 250mm water headPartition stiffness ... light weight,waterproof,soundproof,heat insulation eps sandwich panel 2013* light weight,waterproof,soundproof,heat insulation ...