PU sandwich panel 1,PU sandwich panel for wall & roof 2,Fire-proof PU sandwich panel 3,Sandwich panel on sound insulation. PU sandwich panelPU Sandwich board/panel ... the relevant standards completely.4. Good durability with special coating, the warranty of the color coated steel is 10-15years ... 4mm,0.45mm,0.5mm.The standard width of the panel is 985mm.Thethickness of PU is 50mm,75nn,100mm,120mm,150mm, ...