There are three ways to create stamped concrete walls. The first would be to stamp the walls flat and tilt them up, bolting them into a poured concrete footing. The second would be mixing color hardener with an acrylic bonding agent and water to form a paste, which is then applied to the face of the wall, much like plaster. The third way is to apply the stamps (molds) to the inside of the formwork, pour colored concrete, vibrate and remove the formwork once the concrete is cured.