Holcim (US) Inc. is headquartered in Waltham, MA. Holcim is one of the largest manufacturers and suppliers of cement and mineral components in the United States. In addition to Portland cements, Holcim produces fly ash and slag cement products, such as GranCem(R) cement, to enhance concrete performance. Holcim also makes blended and masonry cements in a wide variety of colors.
