Stamped concrete is concrete that is patterned and/or textured to resemble brick, slate, flagstone, stone, tile, wood, and various other patterns and textures. Stamped concrete is commonly used for patios, sidewalks, driveways, and floors. The ability of stamped concrete to resemble other building materials makes stamped concrete a less expensive alternative to using those other materials. There are three procedures used in stamped concrete which separate it from other concrete procedures; the addition of an accent color, and stamping a pattern into the concrete. These three procedures provide stamped concrete with a color and shape similar to the natural building material. The base color is the secondary color used in stamped concrete. The base color is chosen to reflect the color of the natural building material. The pattern is made by imprinting the concrete shortly after it has been poured with a "concrete stamp". Most modern concrete stamps are pushed into the concrete and color release is applied by spreading the color release has been applied. The concrete stamps are made of polyurethane, but older "cookie cutter" style stamps were made of various metals. The old style stamps lacked the capabilities of forming natural stone texture. Concrete stamping is the procedure which uses the concrete stamps to make the pattern in the stamped concrete. The secondary color is used to produce texture and show additional building materials (e.g. grout) in the stamped concrete. The pattern reflects the shape of the surface of the concrete is