... sandwich panel: 1.LIGH-WEIGHTED, 2.HEAT AND SOUND INSULATION, 3.HIGHLY WATERPROOF, 4.LONG SERVICE LIFE. EPS sandwich roof panel ... Composition: Core materials: EPS, Rock wool, Glass wool, Surface materials: PPGI, GI, ... Comparison of inner wall panel 75 and 120mm ... fireproof featureApplications: Can replace construction materials as red bricks, clay solid bricks, air bricks, color-coated steel sandwich ...