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