TerraWeld exothermic welding system from Altec provides precision engineered molds for optimal results. Permanent molecular bonding is the preferred method for making copper to copper and copper to steel electrical connections. It is a connection using a high-temperature exothermic reaction that does not require an external heat or power source. Its performance is superior to all existing surface to surface connectors. Features include simplicity, corrosion resistance, extended shelf life, high conductivity, portability, ease of use, and it requires no external heat or power source. www.terraweld.com or www.allteccorp.com