Insulate secondary splices and submersible, dig-in and direct buried repairs easily with the quick-to-install 3M™ 8420 cold shrink connector Insulator. This environmental sealing insulator installs without tools and retains its resiliency and pressure over time, providing moisture tight sealing to protect your wires and cable splices from water damage. Use this tubular, open ended sleeve to protect high voltage air insulated lugs and connectors and for environmental sealing of communications wires and other nonelectrical applications.