Spread thin plastic sheeting over concrete that's been poured, leveled and troweled. Wait until the surface water evaporates. Alternatively, dip a masonry brush into a container of concrete stamp release powder and shake the brush over the concrete to distribute the powder. A light coating or dusting of stamp release powder is all that's necessary, but a heavier layer of powder will not impede the stamping process.
Lay concrete stamps, which are thick, embossed rubber mats, on the plastic sheeting that covers the concrete. When using concrete stamp release powder instead of the sheeting, brush the powder on the patterned side of the stamps before placing them on the concrete to prevent them from sticking to the surface.
Press or tamp the mats lightly into the concrete with a tamping tool or a rubber mallet. Do not hit the stamps with excessive force, which can damage the concrete and cause cracks.
Lift the mats and reposition them to continue the pattern across the surface. Although the concrete is not cured at this stage, it is firm enough for you to walk on the mats and reposition them. On surfaces such as patios and driveways, it's impossible to remain on the outer edge of the concrete surface while repositioning stamps to imprint the whole slab. At some point, walking across the mats to reach the remainder of the patio or driveway is usually required.
Remove the plastic sheeting, if you used it, after the stamping process is complete.
Let the concrete cure for two days, misting it lightly with water at least once a day. Do not allow heavy traffic on the surface for two days after stamping.
Rinse the concrete with a garden hose on the third day.