You can count on the 3M 8420 Cold Shrink Connector Insulator to seal out moisture on all solid dielectric insulated wires, cables splices, conduit sealing and breakouts. The cold shrink bond maintains pressure and stays flexible, making it a great choice for insulating secondary splices, direct buried or submersible, dig-in repairs, as well as safeguarding high-voltage, air-insulated connectors and lugs. It needs no tools to install, and it's made of EPDM rubber that contains no sulfur or chlorides. This insulator is ANSI Certified and RoHS 2011/65/EU Compliant.