How to Harden Silicone for Manufacturing Toys

Written by chester rockwell
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How to Harden Silicone for Manufacturing Toys
Silicone is commonly used to make children's toys and action figures. (toy image by Eldin Muratovic from

Silicone plastic is a commonly used material in the construction of plastic toys such as action figures, dolls and souvenirs. Hardening the plastic after you have poured it into the required mould is a required step to finalise the production of the toy. The hardened silicone is what gives the toy a solid construction and paintable surface, allowing the manufacturer to further customise the look of the toy.

Skill level:

Things you need

  • Humidifier
  • Bucket of water
  • Pitcher of water

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  1. 1

    Place the moulded silicone and a humidifier into a room where you can shut off any windows and doors that provide access to it. Allow the humidifier to run until the silicone moulds have hardened. The silicone dries by absorbing ambient moisture, so placing a humidifier in the same room as the moulds can speed the hardening process.

  2. 2

    Place a bucket of water in the same room, and close to, the silicone moulds that you've chosen to make. The bucket of water serves as a low-cost humidifier, which may prolong the hardening process compared to using an electrically driven humidifier.

  3. 3

    Add a small amount of water to the silicone mixture before you pour it into a mould. By adding water directly to the mixture, you can also speed up the time it takes to harden. Be careful not to use too much water, as more than a splash of it can dilute the silicone mixture and make it unusable.

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