Simple Wound Mold Instructions

Mold/wound making with Simulation Technician Sebastien Perth

Supplies typically used

  • Clay
  • Tools to shape the clay, wooden tools work well. But whatever you have around could work.
  • Disposable cups to mix silicone
  • Stir stick (popsicle sticks, tongue depressors)
  • Smooth Cast 300 (there are other types of Smooth Cast, and other brands make similar product.)
  • Dragon Skin FX pro (there are other types of Dragon Skin, and there are other options available on the market.)
  • Silc Pig (optional pigment system compatible with Dragon Skin)
  • Ease Release 300 (a spray can that is used to coat parts that will be used to cast silicone parts)

Making the mold

  1. On a flat surface, use clay to form the wound to your needs. Try to make the transition from clay to work surface smooth, so the end product appears more natural on skin or mannequin.

  1. Keep in mind that the clay design will be what the finished silicone looks like. Take time to clean it up if needed.
  • Dipping a finger in water and then rubbing it on the clay can give it a smoother texture. Just be careful not to use too much water.
  1. Once you are satisfied with the design, build a fence around the piece.
  • Ideally using clay, make a wall around the wound, leaving at least 1cm between the wound and the wall.
  • This will create a flat surface on the mold which will be useful later.
  • Make sure no gaps appear that could let the smooth cast seep out

Pouring the mold

  1. Prepare the smooth cast by pouring equal amount of Part A and Part B into their own cups.

    • You need enough to completely cover the clay wound by at least a few millimetres.

  2. Pour in the smooth cast, if you notice a leak from the clay wall, add more clay to plug the hole.

  1. Wait 10-15 minutes to let it cure. It will get warm to the touch.

Cleaning the mold

  1. Once the Smooth Cast has hardened, you can peel away the clay to reuse. You may notice some thin pieces of smooth cast in the clay, you can take them out and reuse the clay.

  2. The mold may have sharp edges or flashing (thin pieces of plastic), you can use an exacto knife or scalpel to trim away any excess plastic.

  3. Using a toothbrush under warm water can help remove clay that may still be stuck to the mold. Once the mold is cleaned to your liking, move on to the next part

Pouring the silicone

  1. Prepare your material by pouring equal parts A and B into their own cups.

  2. If you want to colour the silicone, now is the time to add a bit of Silc Pig pigment to Part B and mix well.

  1. Once there is no colour streaking, add parts A and B together and mix.

  2. Pour silicone in mold, until about even with top of the mold.

  1. Using a popsicle stick or similar flat edge tool, wipe excess silicone out of the mold by scrapping the flat side of the mold.

  2. Let it cure for the appropriate time.

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