Calumite is a raw material used in the glass industry, offering energy saving and environmental benefits to glass producers. From our site in Scunthorpe, Calumite Limited supply the UK glass industry as well as glass makers as far afield as the Middle East and East Africa. Calumite SRO was established in 1999 in Ostrava, Czech Republic, supplying Calumite to glass works in Czech Republic, Poland and Slovak Republic. We are part of Hanson UK and a member of the HeidelbergCement Group, one of the largest building materials manufacturers in the world.