About Us Denver, CO and Fontana, CA Premier Blending and Packaging Company in Denver, Colorado and Fontana, CaliforniaFormed in 1968, US MIX manufactures and packages products including concrete mixes, sands, cements, grouts, blacktop patches, bonders, mortars and more. See Our Product Lines We Package for US SPEC, SAKRETE and AMERIMIXWe are governed by the principle of doing business in a first-class, right way manner. Contact Us