Ground and polished concrete is a mechanical process of cutting or honing an existing interior concrete slab, adding dye (if desired) and a densifier, a guard or finish coat, and then polishing to the desired level of gloss. Densifying products are used to harden the surface by filling the naturally existing surface pores with additional calcium silicate hydrate (CSH), a naturally occurring mineral in concrete that gives concrete its strength. Over the last decade, this tough, low-maintenance flooring system has entered the architectural mainstream.