Concrete kitchen countertops are made out of a hardened mixture of water, cement, and sand or gravel that isn’t just for your basement floor anymore. Concrete can make quite a statement in the kitchen by adding color or stamping patterns in it. It can be pre-cast to fit a mold or cast on site. To help prevent stains and water damage, consider applying a lacquer sealer to a concrete counter or covering it with a raised glass top.