Sigma, a family company in its third generation, has been operating in the refractory market since 1990 working with passion and flexibility since then.
High specialization and continuous investments over the years in both manufacturing facilities, one in Italy and the other in Bulgaria, have allowed Sigma to meet the growing demands of the glass market supplying the complete range of refractory materials for glass furnaces. .
Via delle Grigne, 12/A, Locate Varesino, CO 22070, Italy
Phone: 39 0331 823195