S.I.G.MA Srl is specialized in the production of Silico/aluminous, Sillimanite, Mullite, Alta Alumina, Zirconium/Mullite, Zir ... conium Silicate, Magnesite, Silica and Electrofusions products. We produce a widest range of vibrocolate and pressed refractory products, dense and insulating, to use in melting furnaces even in the most critical operating conditions. Control, research and development are guaranteed by our laboratory, one of the best equipped of the sector. read more