You’ve created the perfect resin casting. Or at least you thought you did. You try demolding your resin only to find you can’t get it out of the mold. Now what? How are you going to get resin out of the mold?
Here are six of my favorite resin tricks to help you get your resin unstuck.
Trick 1: Add soapy water
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The best-case scenario is that your resin isn’t stuck at all. It might be that the resin is simply hard to demold and needs a little help. All you need to do is add soapy water to the mold, then squish it around while squeezing the mold. This makes the resin slippery and easier to release from the mold.
Trick 2: Put the mold in the freezer.
If the resin is partially cured, put it in your freezer for 10 to 30 minutes. Then, remove the mold and try demolding again. You can also slap the mold on a hard surface to break the bond between the mold and the resin. With any luck, your resin will pop out.
Trick 3: Put the mold in a hot water bath.
Create a very hot water bath and set the resin mold in the bath for five to ten minutes. The heat might allow the silicone to expand, releasing the resin.
Trick 4: Add more resin.
If you have enough room in your mold, you can try adding another layer of well-mixed resin to what is already in the mold. The new resin will bond to the old resin. This is especially helpful if your first pour of resin didn’t cure. You may need to try this several times to remove all the resin.
If the above options don’t work, I’m afraid I don’t have good news for you. Use these next how to get resin out of a mold tricks knowing they might ruin your resin mold.
Trick 5: Apply heat
You can apply light heat to a silicone mold with a heat gun while peeling the mold away from the resin. Unfortunately, this can make the resin stick to the mold even more in places, causing it to tear.
Trick 6: Soak and scrape
This is the last-ditch effort to get uncured resin out of molds. You can soak the resin-filled mold in acetone, then chip and scrape away at the softened resin. But, I’ve found this method quite tedious, and it almost always destroys the mold.
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