If you’ve been wondering how to make a silicone mold, you will love this project. Here are the easy steps to creating a silicone mold with two-part silicone mold putty. Two-part silicone mold putty is easy to use because you don’t need fancy equipment to measure it to make a mold. You can also have a ready to use mold in 30 minutes!
Step 1: Prepare your work surface
Make sure your working surface is clean. Cover it with a wax paper sheet, then tape it in place so it won’t move.
Step 2: Get everything ready
Once you start mixing the mold putty, you need to be ready to use it. That means having the item(s) you are going to mold prepared as well. Be sure they are clean and free of any grease or dirt before using them to make the mold.
Step 3: Measure and mix the putty
This putty mixes one-part A with one-part B. You can ‘eyeball’ equal amounts of the putty to mix it. You can also measure the parts by weight if you have a scale.
Once the two parts are measured, smash them together until they are evenly mixed. This takes about 1 minute. The putty is mixed when the color is even throughout and you don’t see any streaks.
You only need to mix enough molding putty to cover and surround the item you were molding. I usually only mold one thing at a time instead of mixing a bigger batch for a few items.
Step 4: Press the putty around your model
Once the putty is thoroughly mixed, roll it into a ball bigger than your model. Flatten the ball slightly, then place your model into the flattened area. Roll the putty over the object until the item is covered, pushing in somewhat on the sides and corners.
Don’t push too hard. You want to make sure to leave putty at least half to three-quarters inches thick around all sides, or it could rip easily later.
Pro tip: Use a Popsicle stick to push on the sides and flatten the bottom of the mold. This will allow it to sit evenly when you pour resin into it.
Work quickly, as you only have approximately two minutes to mold the putty around your mold once mixing is complete. After that, the mold will not be workable anymore.
Set the mold putty aside to cure for 30 minutes.
Step 5: Demold
Remove your model from the mold by pushing on the sides to loosen the item from the mold walls. After a few pushes, your model should pop out easily.
Your mold is now ready for polymer clay and epoxy resin projects. The molds are also great for soap or candle making. You can also use molds made with this particular brand of mold putty for making food projects like chocolates, candies, and ice cubes.
Want more help on how to make a silicone mold? This video, courtesy of Meredith of Cosmic Designs shows you how to make a simple silicone mold ready to use in 30 minutes.
You can also see how to use two-part silicone putty to make a lego mold.
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