Bendable rod heaters are designed to satisfy the special needs of the metal finishing and semiconductor processing industries. However, they are equally well suited to any liquid heating application where corrosion resistance and/or high purity are critical. These heaters have optimum combination of durability and versatility and they can be bent in to any configuration. Poly tetrafluoroethylene is one of the materials used for making these bendable rod heaters because it is non corrosive, non contaminating and inert to virtually all chemicals.