Established in 1997

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.

New Journey in 2020


Providing integrated services in the fields of refractory, insulation, civil works, construction, electrical, and related services that are renowned in Indonesia.


Becoming a leading company in engineering services, installation, repair, and maintenance of refractory, insulation, civil works, construction, and electrical in Indonesia.


Providing refractory, insulation, civil, construction, electrical services, and their support efficiently and profitably