What Materials Work in Silicone Moulds? Resin, Wax, Plaster & More

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What Materials Work in These Silicone Moulds?

Silicone moulds are exceptionally versatile, making them a staple in casting projects ranging from art and jewellery to craft and model making. Choosing what to cast depends on both the mould material and your creative goals.

Compatible Casting Materials

High-quality silicone moulds—like those made with “Pure Mould” liquid silicone rubber—suit a broad range of casting substances. Typical options include:

Epoxy resin: Ideal for creating clear and detailed pieces, from coasters to jewellery.
Polyester and polyurethane resins: Suitable for reproducing models and art objects.
Acrylic resin: Often chosen for craft items and ornaments.
Wax: Common in candle making or for lost wax casting in jewellery.
Plaster and cement: Great for decorative art, panels or smaller sculptures.

Check that your chosen silicone rubber is compatible with your intended casting material for best results.

Choosing the Right Mould for Your Project

Not all moulds are created equal. For fine, intricate items, softer (lower shore) silicone rubbers such as “Liquid Mould” are recommended. For quick and easy set-up, silicone putties like “I–Gum” are perfect for one-off or small batch moulds. Think about the detail required and the working time you’ll need.

Transparent silicones let you see what’s happening inside, which can help with positioning and ensuring an even cast. If hot casting is needed (like for wax), verify that the silicone can handle the temperature involved.

When This Matters: Project Examples

Choosing a compatible casting material matters most when durability, detail or finish are essential. If you’re making jewellery, opt for epoxies or polyurethanes for a durable, glossy finish. For garden ornaments and art pieces, plaster or cement provide a sturdy structure. Candle makers will benefit from silicone moulds proven with hot wax.

Related guides

Exploring different materials in your silicone mould lets you discover new creative possibilities. For more guidance on mould making and working with epoxy resin, visit our main guide on how to make moulds for epoxy resin.