Exothermic bonding or Thermite welding, this process is used where arc welding may induce to much heat in the joint and is often used for joining cables, as it doesn’t weaken the electrical conductivity in copper wiring since no other metal or alloy is required. When aluminium powder is used alongside a metal oxide, the process creates what is called an aluminothermic reaction.

Exothermic welding requires no external source of heat or current, instead using molten metal that has been heated by a chemical exothermic reaction of a thermite. This can create electrically-sound molecular bonds that are resistant to changes in temperature and not susceptible to the corrosion problems found with mechanical or compression components.