What you see on the outside of Sonoma Cast Stone concrete beer tanks  is a strikingly beautiful, showroom-quality, polished concrete fixture, in the colors of your choice, proudly displaying your logo and the superior standards of your beer and your brewery to all of your guests. What you don’t see is the quality of the concrete under the dazzling finish, the 20 years of experience developing concrete formulations, and the dual layers of interior concrete that allow us to give you the industry’s only guarantee against structural cracking.