The insulation material is a critical element to the reliability and strength of any connection. The Perma-Seal™ line uses NiAc™ which has three main advantages over other materials. First, it shrinks at a much lower temperature than Nylon and Polyolefin. Second, it has a fast shrink time of 18 seconds as compared to 22 seconds for Polyolefin and 45 seconds for Nylon. Third, it has superior performance with excellent abrasion, chemical, and water resistant characteristics.