With two manufacturing facilities in full operation, one in Plovdiv, Bulgaria and the other in Locate Varesino, Italy, SIGMA Group is today an international leader of special pieces, particularly those of considerable tonnage. We operate on five continents selling more than 80% of our production abroad, supplying the complete range of materials for glass furnaces from Fireclay to Sillimanite, Mullite, High alumina, Zircon-mullite, Zircon, Magnesia based materials, Silica and Fused cast.

Via delle Grigne, 12/A, Locate Varesino, CO 22070, Italy

Phone: 39 0331 823195

[email protected] | http://www.sigmaref.it