Insimbi Industrial Holdings Limited engages in the provision of ferrous and non-ferrous alloys, and refractory materials in South Africa and internationally. It operates through Non-Ferrous, Ferrous, and Refractory segments. The Non-Ferrous segment supplies non-ferrous recycled metals for the foundry, non-ferrous, automotive, heavy aluminum, and powder coating industries. The Refractory segment provides refractory requirements of steel, and cement industries; and supplies industrial heat-resistant textiles. The Ferrous segment offers steel and polypropylene fibers to the welding and optical industries, as well as various ferrous-based recycled metals. The company serves steel, aluminum, cement, foundry, and paper and pulp industries. It also exports its products. The company was founded in 1970 and is based in Germiston, South Africa.