Self-healing polymers used to fabricate electrical devices or to coat electrical devices that have a metal or polymer substrate. The self-healing polymers can be made from modified polymers including polyurethanes, polyureas, polyamides and polyesters and, optionally, cross-linking agents and one or more catalysts. The self-healing polymers can be used to make cable ties, tape, conduit fittings and explosion-proof sealant materials.