What to Try If Resin Sticks in the Mould

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What should I do if the resin sticks in the mould?

Getting your resin box out of the mould should be a quick process, but sometimes the resin can cling stubbornly to the silicone. Here’s how to approach a stuck resin casting and prevent issues next time.

Gently Releasing Resin from a Stuck Mould

If your resin piece won’t budge, start by lightly flexing or bending the mould from different sides—this is often enough to break the seal and release your work. Avoid using sharp objects or excessive force, as these can damage both the mould and your casting. Silicone moulds like the Small Glass Jewellery Box Silicone Mould are designed to be flexible and non-stick, so patient, gentle pressure usually works best.

Cleaning and Caring for Your Mould

Resin can stick if the mould has residue or if aggressive cleaning products have been used. Always ensure the mould is completely clean before your next pour, and avoid harsh solvents that may degrade silicone. Rinse with warm, soapy water and allow to dry thoroughly. Inspect for any leftover pieces of cured resin and peel these away if necessary.

Best Practices to Avoid Resin Sticking

Release resin from the mould within 12 hours of pouring, as prolonged curing can promote sticking.
Make sure the resin mixture is properly measured and mixed to achieve a full cure, as undercured resin is more likely to adhere.
Store your moulds away from dust and sunlight, which can affect their non-stick qualities over time.

When This Matters Most

Careful removal and mould maintenance are especially important for repeated projects, or when crafting detailed small boxes where surface finish is key.

Related guides

How To Make A Small Box With Resin

By following these steps, you can save both your resin creations and silicone moulds for future use. For more advice on successful box casting, see our full guide on making a small box with resin.