Elementis plc announced that it has agreed to sell its Hardman epoxy and urethane products business headquartered in Belleville, NJ, for a cash payment of approximately £7.8m ($14.8 million) to Royal Adhesives and Sealants, LLC.      Royal is a manufacturer and marketer of specialty adhesives and sealants for use primarily in industrial and commercial applications throughout the U.S.      Hardman, which has previously been managed as part of the Elementis Specialties business, is a manufact...