Durasilk for cartridge heaters facilitates easy removal from precision-drilled holes. The coating is bonded directly to the heater sheath for ease of handling. It acts as a solid lubricant once the heater has been energized in service. Additional release agents do not need to be applied to the heater sheath prior to insertion. In addition, the coating is expected to inhibit corrosion and facilitate faster heat transfer to lengthen the service life of the heater. It is available on all of the company’s standard and metric sheath sizes.