The Kalzip business unit of Corus Building Systems became Kalzip Inc. as of Feb. 2. Kalzip, Michigan City, Ind., will no longer operate under the Corus Building Systems name. Both the company and brand name will become “Kalzip Inc.” at all of the company’s locations. Kalzip will now operate as a business unit within the West Midlands, United Kingdom based Corus Distribution and Building Systems Division, which is an operating company within Tata Steel Europe Ltd., London.