A method for making joints in an electrical cable is disclosed. A first cable having polymeric insulation and a first bare conductor end and a second cable having polymeric insulation and a second bare conductor end are provided and joined create a conductor joint. A curable reaction mixture is applied over the conductor joint and cured to form a polymeric insulating sheath over the conductor joint and bonded to the polymeric insulation of each of the first and second cables. The reaction mixture includes a carbon-Michael acceptor compound, a carbon-Michael donor compound and a carbon-Michael reaction catalyst.