U.S. Silica Holdings, Inc. is a producer of industrial silica and sand proppants. Then Company produces a variety of industrial minerals including sand proppants, whole grain silica, ground silica, fine ground silica, calcined kaolin clay and aplite clay. U.S. Silica offers its products to the oil and gas, glass, chemical, and building products industries.
8490 Progress Drive
Frederick, MD 21701