You'll prolong the life of your solid dielectric insulated wires and cable splices with the help of our 3M 8420 Cold Shrink Connector Insulator. It consistently maintains its pressure over time to provide a reliable layer of insulation on a variety of applications, including direct buried or submersible, dig-in repairs as well as secondary splices. This hard-wearing rubber insulator also offers impact protection on air-insulated, high-voltage lugs and connectors. It creates a moisture-tight seal to keep the elements away from your work. Trust in the resilience offered by our 3M 8420 Connector Insulator to operate in temperatures of -40 to 194 degrees F (-40 to 90 degrees C). This product is ANSI Certified and RoHS 2011/65/EU Compliant.