... ; Heat insulation and waterproof Polystyrene Sandwich panelProduct: EPS Sandwich Panel Thickness for EPS: 50mm, 75mm, 100mm Thickness for steel ... 5, waterproof; 6, mighty carrying capability. Introduction: EPS sandwiched panel is composed of 2 layers of waterproof colored steel and ... workplace, etc.Application: Warehouse, gymnasium, exhibition halls, storage, refrigerator .... exterior wall panels