... sandwich panel production line 1.Low water absorption 2.high hardness, good anti-corrosion 3.good thermal insulated ca eps sandwich panel production lineEPS sandwich panel ... 20 kgs/m3, steel sheet:0.2-0.6mmEPS sandwich panel for roofLength:unlimited,<12m due to transportColor:blue,white and ... core between them. The insulating core can be mineral wool, polyurethane, polyisocyanurate, or polystyrene.