Who We Are

Graymont supplies customers across the continent with high-quality lime products from a network of close to 20 locations spanning the United States and Canada. The Company also has a significant investment in Grupo Calidra, the largest lime producer in Mexico.

Graymont's Lime operations are focused on the production of high calcium and dolomitic lime and value-added lime-based products such as hydrated lime and precipitated calcium carbonate as well as pulverized limestone and construction stone. The Company also includes construction-materials operations, the Materials Group.

Graymont has roots stretching back almost seven decades and operations which, in some instances, have been lynchpins of their local communities for well over a century. As might be expected of an enterprise with such a history, Graymont takes a long-term approach to business that is evident in its strong commitment to sustainable growth. Graymont strives to be an industry leader and attain world-class performance in all aspects of its operations, particularly in the areas of workplace health and safety and environmental stewardship.

We aim to be the preferred supplier, employer, and partner of choice wherever we operate.

Product Application

Graymont has technical and sales personnel skilled in solving customer problems. They are available to work with customers to recommend the proper products to meet their specific needs. This may include support on flue-gas treatment projects, steel blends of high calcium and dolomitic products, the use of lime in asphalt, or how to apply building products.


Graymont has extensive expertise in the transportation of our products, by truck, rail or water. The emphasis is on building reliable, cost-efficient supply networks to best serve our customers. An example of this commitment is the operation of a fleet of specialized barges that deliver precipitated calcium carbonate to customers in the paper industry in the Pacific Northwest.

Material Handling

Graymont will review and inspect customer material-handling facilities and design criteria in order to ensure efficient and economical operations. Upon request, Graymont is prepared to own and operate such facilities at the customer's site, including storage facilities. Graymont also leases portable slakers and silos, as well as unloading and material-handling equipment for short-term projects.

Research and Development

Graymont is prepared to collaborate with customers on R&D initiatives for new product and process applications. Graymont has portable slakers and unloading conveyors available to facilitate testing of new applications at a customer's site.