Novar plc (Formerly Caradon plc) was an international building supplies group based in the United Kingdom. Novar was formed in 1921 as Metal Box Company from the coming together of several businesses and trades, including canning and printing. By the 1970s it was a market leader in these fields. In the 1980s the company diversified into building supplies and at its peak consisted of 30 companies supplying products to the construction and DIY industries.