DUNALON with is strong characteristic of water & moisture resistance is thermo-chemically processed into non cross-linked P.E.foam . It is exellent for preserving heat & cooling energy and provides strong protection against water & moisture. "DUNALON" P.E.foam sheet is fire retardant certified by Underwriters Laboratories, USA with its U.L mark. It is also certified by Korean governmental authority. The Energy administration, for its superior property of heat & cooling energy preservation.