(Formet), a manufacturer of galvanized-steel products mainly for the construction of highways, was established in 1983.

de C.V., a joint venture between IMSA and the Signode Division of Illinois Tool Works, Inc. In 1978, the steel- and plastic-strapping business was incorporated into IMSA Signode, S.A. Beginning in this decade, the steel and plastic construction-products segment of IMSA-which included value-added steel-processing products such as culverts, guardrails, and steel strapping manufactured by the company since the 1950s-was separated from the steel-processing products segment and established as a separate business within the corporate structure. de C.V., a company producing fiberglass-reinforced plastic panels. Three years later, the company acquired Stabilit, S.A. In 1972 Grupo IMSA began manufacturing sophisticated insulated polyurethane and steel sandwich panels for the Multypanel system of modular wall and roof components being used to meet many of Mexico's building needs. IMSA grew significantly as a steel processor during World War II and in subsequent years. A closely held company run by members of the Canales, Clairond, and Reyes families, it interacted with others in Monterrey, the dynamic center of privately owned manufacturing operations in Mexico. in 1936 and became known by its acronym (IMSA). The company was founded as Industrias Monterrey, S.A. Extensive operations in the United States, Argentina, Brazil, Chile, and Venezuela have enabled Grupo IMSA to prosper despite the erratic performance of the Mexican economy. The company also is the largest automotive starting, lighting, and ignition battery producer in Mexico, the largest producer of fabricated aluminum products in Mexico, and one of the largest producers of prefabricated steel and foam-insulated panels in North America. It is Mexico's largest intermediate steel processor in terms of sales volume. is a Mexican-based holding company whose four subsidiary holding companies are engaged in diversified manufacturing in the United States and several Latin American countries besides Mexico.

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