Securing the Master
The master was glued onto Plexiglas with two small drops of super-glue to hold it in place; however, any smooth surface like glass or plastic will work. This will prevent the master from moving while the silicone sets.

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Making the "Box"
A small round box was built around the master and putty was rolled around the bottom edge. This will prevent the silicone from leaking out the bottom. I used kid's "Play-Doh" for this as it's cheap, and yes, edible!

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The Silicone
The silicone moulding rubber I chose to use, was Smooth-On OOMOO which gives a flexible mould. What is nice about this brand, is that it is a 1:1 measurement, making it very simple to measure the amounts.

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