How to Make a Concrete Stamp

Creating your own concrete stamps is an affordable alternative to hiring a professional. By making your own stamps, you have creative control and the ability to reuse your stamps for future projects.

Things You'll Need

  • Poly 75-80 polyurethane rubber
  • Bucket and stick for mixing the 2-part rubber (or a heavy duty drill and stirring paddle)
  • Sealer
  • Aerosol stamp release
  • Stone or pattern to create the stamp

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Prepare the Rubber and Pattern

If you are using a stone as your stamp mold, you will need to seal the side you will be making the mold from. Follow the manufacturer's instructions regarding application, dry time and work space requirements. For non-porous stamp molds, you do not need to apply a sealant.

In a well-ventilated area, lay your stone or mold level on your work space. Use carpentry shims to lift edges to create a level surface. It is important for your mold to be level so that the rubber, in liquid form, will create a full stamp.

Mix the two part rubber in the bucket using a stick or a drill and stirring paddle. A more thoroughly mixed rubber will dry faster. You have about a 20-minute time span before the rubber will set in the bucket. Follow the manufacturer's instructions regarding work space requirements, mixing and dry times.

Creating the Stamp

Spray your mold with aerosol stamp release. This will make the surface slippery and keep the rubber from adhering to the mold.

Pour the rubber mixture onto the center of the mold, allowing the rubber to level itself out. It is better to pour several thin layers than one thick layer. The edges of the stamp will be thinner than the middle. This will help when you are overlapping the pattern when stamping.

Let the rubber set, following the manufacturer's instructions. The corners of the rubber will lift as the rubber dries; this is normal and useful when releasing the set rubber. Once the rubber has set, release it from the mold and prepare the concrete for stamping.

Tips & Warnings

  • If the rubber hardens over the edge of the mold, cut back the excess with a sharp utility knife before releasing the mold.
  • Wear safely goggles and rubber gloves when working with the liquid rubber. Be sure to follow all manufacturer's instructions when working with chemicals or power tools.
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