United States Antimony Corporation (USAC) specializes in the production and sale of antimony and zeolite products, catering to diverse industries like flame retardants, batteries, ammunition, and environmental remediation. Operating the only significant antimony smelter in the United States, USAC supplies critical materials such as antimony oxide, trisulfide, and metal for applications in safety and technology. Additionally, its zeolite products are used in agriculture, water filtration, and environmental cleanup. With mining and milling operations in Montana and Mexico, USAC is focused on expanding its resource base to meet rising demand while supporting strategic industries with essential materials.