PT Sigma Mitra Sejati is a competent and long-experienced company in the field of Refractory and Insulating since 1997, In 2003, PT. Sigma Mitra Sejati began producing Refractory (Shaped and Unshaped) such as Castable, Long Nozzle, Ladle Nozzle, Well Block, Setting Block, Cassette Plate. These products are currently used in various companies for melting, casting, and firing installations in industries such as steel, cement, glass, aluminum, ceramics, etc. Starting from 2020, PT Sigma Mitra Sejati has expanded its business beyond the Refractory and Insulating field, including Construction, Civil, Mechanical, and Electrical services. The scope of work includes Engineering, Procurement, Construction (EPC), Installation, Service (Repair), Maintenance, and Procurement of Goods/Spare Parts.