How to Make Silicone Soap Molds

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If you make molded soaps, you probably have some favorite molds--and have ideas for shapes you would like to make but cannot find molds for. Silicone is a great molding material for soap. It is flexible and nonstick, so the finished soap pops right out of the mold. It also is heat resistant, so the melted soap will not damage the mold. The hardness of your soap will affect the designs for your mold. For example, French milled soaps can hold more complex shapes than cold processed glycerin soaps can.

Things You'll Need

  • Primary model
  • Small, firm paintbrush
  • Two-part silicone modeling compound
  • Choose a primary model. This can be any shape you want to duplicate in soap. Objects with hard surfaces, such as seashells or coins, work best.

  • Clean the model. Use a paintbrush to thoroughly clean the surface, removing any dust or dirt that has accumulated, especially in the indentations of the object.

  • Mix a two-part modeling compound, such as Silicone Plastique. Knead the two parts together until the entire mass is uniform in color. Once mixed, the compound will begin to cure in 10 to 15 minutes, depending on the temperature. Therefore, you will need to work quickly.

  • Apply a thin layer of modeling material to the primary model. Work it into the details of the object, completely filling in all indentations.

  • Apply a second layer of modeling material over the first. This layer should be at least 1/4-inch thick and smooth on the outside. Be sure to apply the second layer before the first begins to cure or the two layers will not adhere.

  • Cure the mold for at least an hour at room temperature.

  • When the modeling material is completely dry to the touch, remove the primary object. Your silicone soap mold is ready to use.

Tips & Warnings

  • Refrigerate the two parts of the modeling compound before mixing to increase your work time. This will slow down the curing process.
  • Silicone Plastique is food-grade silicone, so you also can use your molds for chocolate, gum paste and other pastry-molding crafts. Be sure to clean them thoroughly between uses.
  • Silicone molds are dishwasher safe.
  • Work quickly once you have mixed the two parts of the silicone modeling compound. Once the material begins to cure, it cannot be molded.

References

  • Photo Credit Thinkstock Images/Comstock/Getty Images
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