Ethylene tetrafluoroethylene (ETFE), a copolymer of ethylene and tetrafluoroethylene, is characterized by favourable thermal, chemical and electrical properties. It was designed to have high corrosion resistance and strength over a wide temperature range. Ethylene tetrafluoroethylene is essentially an alternating copolymer consisting of ethylene and tetrafluoroethylene segments. One big application range for ETFE insulated cables are high temperature coaxial and data cables (engine control unit). Extrusion of thin and ultra thin wall thickness is possible. Cross linking of ETFE insulation improves thermal stability and abrasion resistance. ETFE is commonly used in the nuclear industry for tie or cable wraps, and in the aviation industry for wire coatings. This is because ETFE has better mechanical toughness and chemical resistance compared to PTFE. In addition, ETFE exhibits a high-energy radiation resistance and can withstand moderately high temperatures for a long period of time.