... ISO9001:2000 ISO14001:2004 pu sandwich panelFeatures:1. Heat and sound insulation. Temperature suitable for PU ranges from -200 centigrade ... of manufacture effective.4. Energy conservation, environmental protection, economical, heat insulting, good structure, easy-doing construction5. Light weight enough ... , SMP, PERecommended PlatingHot-dip galvanized, Al-Zn coated thermal insulation pu sandwich panel