Caring for Silicone Moulds to Maintain Shore Hardness

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How to Care for Your Silicone Mould and Preserve Hardness

Proper care for your silicone moulds is essential if you want them to retain their original Shore hardness, ensuring both their flexibility and service life. By following a few straightforward maintenance steps, you can achieve consistently reliable results in your moulding and casting projects.

Cleaning Your Silicone Moulds

After every use, gently clean your silicone mould with mild soap and lukewarm water. Avoid using harsh detergents or abrasive pads, which can degrade the surface and affect the rubber’s hardness over time. Allow the mould to air dry thoroughly before storing it. This simple habit helps maintain both the finish and resilience that are crucial for precise reproductions, whether you’re using high-detail casting silicones or silicone moulds for chocolate, soap or resin.

Optimal Storage Conditions

To preserve the original Shore hardness of silicone rubber, it’s important to keep moulds away from direct sunlight and sources of heat. Prolonged exposure to UV rays or extreme temperatures can cause the silicone to lose its structural properties. Store moulds in a cool, dry place out of direct light, and never leave them near radiators or in hot vehicles.

Gentle Use and Demoulding

Treat silicone moulds with care when removing casts. Allow sufficient curing time for your medium, then gently flex the mould to release the piece without excessive stretching. For example, with products like “Cabochon-15”, it’s advisable to remove items within 12 hours when working with resin to avoid permanent changes or sticking. Consistent, gentle use helps maintain both the surface and the intended Shore hardness.

When This Matters

If you rely on your silicone moulds for detailed or repeated castings—such as jewellery, soaps, chocolates, or craft pieces—keeping the original hardness intact is critical to achieving clean, repeatable results. Compromised moulds may lose definition or become too soft over time, affecting quality and ease of use.

Related guides

What Is The Shore Hardness Of Silicone Rubber

Looking after your silicone moulds not only extends their longevity, but also ensures they work as intended—retaining the Shore hardness vital to your creative and technical projects. For more about silicone rubber hardness and mould options, explore further on our dedicated Shore hardness guide.