Lafarge SA is a France based company which produces and sells building materials that include cement, aggregates, ready mix, concrete, gypsum wallboard, and related products, primarily under the Lafarge brand. Its products are used to build and renovate residential, commercial and public works. The Company operates in three segments: Cement, Aggregates and Concrete and Gypsum. The Cement segment produces and sells basic building materials, special cements for specific applications and products suitable for exposure to sea water, sulfates and other aggressive environments. The Aggregates and Concrete segment produces and sells aggregates, asphalt and paving for engineering structures, roads and building construction, and revamped concrete, self-placing and self-leveling concrete, among others. The Gypsum segment mainly produces and sells plasterboard systems and gypsum-based interior solutions, among others. In November 2013, Cementos Argos SA acquired majority stake in the Company.