SGI has provided high-quality specialized products to the North American building materials industry for almost 100 years.
1923
The Charmian plant, located in Blue Ridge Summit, PA begins operations.
1939
The Kremlin plant, located in Pembine, WI begins operations.
1965
The Annapolis, MO plant begins operations.
1989
ISP minerals is created as a separate operating subsidiary of International Special Products Inc. (ISP), a global specialty chemical manufacturer.
2003
ISP, together with ISP Minerals, becomes a private company.
2004
SGI acquired the Ione, CA, Plant.
2010
The chemical portion of the business is sold. ISP Minerals becomes SGI, a privately held company.
2016
SGI becomes an operating company of Standard Industries.
2016
SGI's central R&D laboratory is renovated to provide a facility dedicated specifically to mineral roofing and aggregate materials.
2018
An Aggregates Plant with an on-site laboratory is created at the Charmian Plant to support the growing Building Materials portion of SGI's business.
2019
The Waynesboro Pelletization Plant opens to produce SGI's pelletized soil amendments for agriculture and to operate as a toll manufacturing facility.
2022
SGI's R&D facility is consolidated in new, state-of-the-art laboratories equipped to support roofing, building materials, and agricultural efforts.