3M Scotchcast Inline Resin Power Cable Splice Kit 82-A1, Up To 2Awg. The 3M Power Cable Splice Kit is designed to seal unsound or improperly installed splices. It is made of high-strength brass and acrylic resin for durability and insulation. The material hardens in about 1-2 hours and seals the unsound joint to prevent water from entering the cable. The product is UL listed, so you can be sure it's safe for wet environments. It makes a permanent solution for sealing splices on single and multiple-conductor cables. Your network will be protected against short circuits and data loss.