- How do you pour the silicone?
- How do you keep your part from floating?
- How will you make your mold? 2 parts? 1 part? Brush-on? Where does the parting line of your mold go?
Silicone is an amazing rubber material that is a strong, durable rubber. After the silicone has cured, it will remain a rubber forever. My advice is to keep the silicone for your castings, and use a re-usable molding material for your molds.
I say this, of course, because I'm biased and think that ComposiMold and ImPRESSive Putty are better choices for making your own molds. Whether you are learning how to make your own molds or are already skilled (and already spent tons of money learning :) ), these re-usable molding materials can help. ComposiMold and ImPRESSive Putty are re-usable molding materials that can be re-used Any Time You Want. If you make mistake, make it again. If your mold starts to get old, make it again. If you change your mind, make it again.
Silicone molds will last for years. If you're into nostalgia you may like that. But you can also keep ComposiMold molds for years if you'd like...keep them in a ziplock bag and out of the sun and they'll last as long as you like.
Silicone molds will not allow you to make changes, fix mistakes, or experiment. Better materials exist.
ComposiMold and ImPRESSive Putty. Give them a try.
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Enjoy Mold Making and Casting with ComposiMold, ImPRESSive Putty, and EpoxyColors