How to Make Concrete Landscape Molds


Making a mold of concrete landscaping blocks, bricks or rocks is a simple project that can save you a lot of money. The time it takes to make each mold is well worth the money you will save, and creating a mold requires no prior experience. With one mold, you can make multiple casts of an original block.

Things You'll Need

  • Silicone
  • Paint brush
  • Landscaping block
  • Cheesecloth
  • Sand
  • Box or bin
  • Paint (optional)
  • Concrete dye (optional)
  • Use a paint brush to cover a landscaping block with seven layers of silicone molding rubber. Let the silicone dry for 10 to 15 minutes between each coat. Do not cover the bottom of the block, but make sure the top and sides are completely coated with silicone.

  • Place a layer of cheesecloth over your block and press it gently into the mold. Cheesecloth strengthens the structure of the mold. Apply two more layers of silicone. Allow the mold to set for 24 to 48 hours after you have applied the final layer.

  • Peel the mold back from the block and put it in a box or bin filled with sand. The sand keeps the mold from twisting or tearing when it is filled with concrete.

  • Mix your cement according to the manufacturer's directions. Add concrete dye to the mix if you want to create a colored concrete cast.

  • Pour the cement into your mold. Be careful not to overfill the mold, as it will become cemented to the sand. Let the concrete dry for one to two hours or until it is dry to the touch.

  • Remove your concrete cast from the mold. The mold can be used repeatedly to make more casts.

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  • Photo Credit Brand X Pictures/Brand X Pictures/Getty Images
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