What Can I Cast in Silicone Moulds?

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Silicone moulds have become a favourite tool for makers and professionals thanks to their ability to capture fine details and stand up to repeated use. They’re wonderfully versatile, but it’s important to know what casting materials are best suited for use with them.

Popular Casting Materials for Silicone Moulds

The most common materials for casting into silicone moulds include resins (such as epoxy, polyester, and polyurethane), wax, plaster, and cement. These materials flow easily into the mould and cure without reacting adversely to the silicone, ensuring clean and detailed reproductions. Silicone moulds are especially popular for creating resin art, jewellery, candles, figurines, and decorative objects.

Resin: Ideal for jewellery and detailed models.
Wax: Used for candle making and lost wax casting.
Plaster & Cement: Great for ornaments and sculpture.

Casting Techniques and Tips

For best results, select a casting material that’s compatible with your mould. When using resins, ensure your workspace is clean and measure your components accurately. If you’re just getting started, products such as the “Liquid Mould” Casting Liquid Silicone Rubber are designed for fine detail and multiple uses. For wax or plaster, gently tap the mould to remove air bubbles before setting. When working with cement, use small sections to avoid stresses during curing, especially in detailed or thin moulds.

When Compatibility Matters

Choosing the right casting material isn’t just about the end result. Some materials, such as select low-melt metals, may be possible but always check the temperature tolerance of your specific silicone. For standard DIY and craft projects—resin, wax, plaster, and cement—silicone moulds offer reliable, repeatable performance without special preparation. Always check your mould’s specifications before introducing heat or unfamiliar substances.

Related guides

How To Make Rubber Using Silicone Glue

Whether you’re crafting resin jewellery, pouring plaster statuettes, or preparing wax candles, knowing what you can cast in your silicone mould helps ensure successful projects every time. These casting options are central to mastering silicone mould making, a key element explored in our main guide on how to make rubber using silicone glue.