RPM International Inc., a company manufacturing and marketing high-performance coatings, sealants and specialty chemicals, announced that it has acquired two companies, a manufacturer of commercial floor cleaning equipment and chemicals, and a manufacturer of specialty chemical raw materials, including additives for plastics. The companies have combined annual net sales of about $42 million. Terms of the transactions were not disclosed. RPM says its Legend Brands business acquired the Prochem business from Kärcher North America Inc. Located in Chandler, Arizona, Prochem manufactures professional equipment and chemicals for cleaning and restoring carpet, upholstery and hard flooring surfaces, and has annual net sales of around $22 million. RPM also acquired 80% of Arnette Polymers, LLC. Based in Richmond, MO, Arnette Polymers makes specialty chemical raw materials, including additives for nylon, epoxies and polyurea, and has annual net sales of about $20 million. It will operate as part of the RPM Performance Coatings Group.