Shop for ECTFE (Halar®) rods. ECTFE (ethylene chlorotrifluoroethylene) is stronger, stiffer, and more dimensionally stable than many other fluoropolymer materials. It exhibits excellent electrical properties, a low coefficient of thermal expansion, and low moisture absorption. ECTFE has exceptionally smooth surfaces compared with other fluoropolymers, which make it an ideal choice for many high purity applications in the pharmaceutical and semiconductor industries. Stocked materials typically ship in 2-5 business days. Can’t find what you need? Get a quote.