How to make a simple and perfect silicone moulds?

1. prepare the original molds:

you must make sure your original molds perfect. And fix the original mold on a board , then used four piece of board to enclose the original mold.

2. Pls clean the surface of the original model, and dry it, then evenly brush a lay of mold release agent (Vasline or detergent can be used as mold release agent)

3. Take 100g of part A and add 2g of part B and mix the silicone rubber and curing agent evenly.

Notes: Moulding silicon rubber is a kind of flowing liquid and it contains two parts. Part A is a kind of white flowing liquid silicone rubber and part B is the curing agent. Remember to mix part A and part B evenly, otherwise the silicon rubber will be partly solidified and this will give birth to difficulties in your final operation. What’s more, the finished moulds will meet a short life. All of these will cause a waste of silicon rubber.

4. vacuum pumping: Without exception, this step takes less than 10 minutes. Otherwise, it will cause cross linking reaction, and no more further steps will be available

5. pouring way operating:  

Slowly and evenly pour the mixed silicon rubber into the square frame, make sure all the corner of the original mold covered with this mixed material. 6-8 hours later, the rubber is dry, then a mold is formed.