Thermit Welding is a welding process utilizing heat generated by exothermic chemical reaction between the components of the thermit (a mixture of a metal oxide and aluminum powder). The molten metal, produced by the reaction, acts as a filler material joining the work pieces after Solidification.

In Thermit welding process, iron oxide and aluminium oxides are mixed in the ratio 3:1.

An apron is a safety accessory used to protect front body of the welder.