Please see link below for your basic steps and more information:
Step 1: Prepare your item to be molded
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Inspect item to be molded and ensure that it is clean and free from dirt, grease, oil, scratches, or blemishes.
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Fasten your item to a piece of non-porous wood or plastic using hot melt or super glue. If your item is not completely flat for gluing, you can lightly embed the item in synthetic clay as shown here. This will act as the base for molding.
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Step 2: Build your mold box
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Find a non-porous material to use for mold box. Commonly used items are old plastic containers, wood, PVC tubing, or plastic sheeting.
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Build your mold box 1⁄4” to 1⁄2” larger than your item. Making it too large will waste your silicone molding rubber.
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Seal the mold box to the base using clay, hot melt glue, or tape. Also, seal any seams on the mold box were silicone may leak out.
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Step 3: Mix Silicone Rubber
Calculate the volume of silicone needed. 1lb. of Silicone Rubber is approximately 21 cubic inches of volume. The Mini Kit volume of rubber is approximately 5.5 cubic inches. (Cubic Inches = Length x Width x Depth)
BY WEIGHT (With Scale)
10:1 mix ratio. Measure out 10 parts of base to 1 part catalyst by weight.
BY VOLUME (1lb kit)
Using 1oz cups & scoop provided in the kit, measure 1 scoop of catalyst for every 2 ounces of Base.
MINI KIT (Premeasured)
Shake Catalyst bottle and add it to the container of Base. (Must use the entire kit at one time.)
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