How to Make a Concrete Stamp

Lead Image
What You'll Need
Poly 75-80
Polyurethane rubber
Stick (for mixing the two-part rubber)
Aerosol stamp release
Stone or pattern (to create the stamp)
Carpentry shims

A concrete stamp adds a stylized pattern to any concrete pour. Using a concrete stamp, your driveway can mimic more expensive building materials such as stone or brick. You can find a variety of design choices with a concrete stamp.

Step 1: Prepare The Stone For The Mold

If you are using a stone as your stamp mold, you will need to seal the side you will be making the mold from so that the mold will not have imperfections and break. Use the sealer to seal any pores in the stone. Non-porous molds do not need a sealer.

Step 2: Prepare the Mold

On a flat, level surface make a square area with the carpentry shims. Lay the mold in the middle of this level area between the shims.

Step 3: Mix The Two-Part Rubber

Be sure to do this step in a well-ventilated area, as the fumes can be strong and extremely dangerous. Mix the two-part rubber thoroughly. A well-mixed rubber will dry faster, so you should have about 20 minutes before the rubber dries in the bucket and becomes difficult to work with. A drill with a mixing paddle will allow you to mix the rubber faster and more thoroughly, thus giving a better consistency to the mixture.

Step 4: Spray The Mold With Stamp Release

The aerosol stamp release will make the surface of the mold slippery so it will not stick to the rubber. Spray liberally over the mold in the middle of the square shims to keep the rubber from adhering to the mold.

Step 5: Pour the rubber mixture in the center of the mold

Pour the rubber slowly so that the mixture evens itself over time. It is better to pour several thin layers rather than one thick layers. The edges of the stamp will thinner than in the middle, but this will help you later on. This allows for better overlapping when stamping.

Step 6: Let The Rubber Set

The manufacturer’s instructions should state how long the rubber takes to set. Do not be alarmed if the corners lift as the rubber sets, as this is common. Once the rubber is set you can release it from the mold and it is ready for stamping.

This stamp can be used to create a patterned concrete area as large as you desire. As you get the hang of laying down a pattern it will become easier and easier.