Exothermic welding, also known as exothermic bonding, thermite welding, and thermit welding, is a welding process that employs molten metal to permanently join the conductors. The process employs an exothermic reaction of a thermite composition to heat the metal, and requires no external source of heat or current. Cadwelds are used when installing ground grids or connecting new equipment to existing ground grids. They can join copper to copper, copper to steel, or copper to cast iron. The joints can be welded and then buried in the ground or concrete with little fear that they will degrade over time. CALL ON US FOR A FREE ESTIMATE.