3M Cold Shrink Foldback Splice Jacket Kits SJ-FB Series folded back, tubular rubber sleeve that combined with Scotch(R) Rubber Mastic Tape 2228 provide a sealed jacket over cable splices installed on JCN and other types of jacketed power cable. Kit contains: 1 foldback tubular rubber sleeve and 1 roll Scotch(R) Rubber Mastic Tape. 6/case