3M HDCW Series Wraparound Cable Repair Sleeve The HDCW series wraparound cable repair sleeves have been designed to be used in the must harsh of environments to repair damaged cable sheaths. It is also ideal to use as additional protection against corrosion on undamaged cables. The inner wall of the sleeve is lined with hot melt adhesive which provides a safe and water tight bond with the cable. A corrosion proof metal clip is used to fully close the sleeve. Various sizes are available to suit different cable diameters.