1) Figure out how much silicone you need by calculating the volume of the box.(the volunme of the box: the amount of silicone = 1:1)

2) Measure the silicone and mix it. Don’t make any mistake of not mixing thoroughly. There’s nothing worse than wasting a mold because of inadequate mixing.

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3) After mixing the silicone, remove the bubbles with orbital palm sander while mixing it.
 
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4) Pour the silicone in one location into the box. Pour as thin a stream as you can.

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5) Again, remove the trapped bubbles in the mold by agitating it with an orbital palm sander about 5 minutes.

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