Is Silicone Putty Suitable for Clay Moulds?

How Silicone Putty Works for Clay Moulds

Silicone putty, like I–Gum, is a two-component, non-toxic compound that can be mixed by hand in equal amounts and pressed directly onto your clay model. The putty captures details well for small items and sets within about 20 minutes, giving you a usable mould without a lengthy wait. Its ease of use and odour-free formula make it particularly suitable for hobbyists or crafters working on small decorative clay pieces, coasters, trays or jewellery.

Choosing Between Putty and Liquid Silicone for Clay

Silicone putty is quick and straightforward, but it’s generally a better fit for small and less intricate objects. For models with extensive undercuts or fine details, liquid silicone rubbers such as Pure Mould may provide greater flexibility, allowing for more complex clay impressions. While putty doesn’t require special tools or mould boxes, its firmer texture may not always reach deep crevices as well as liquid alternatives.

Practical Advice for Using Silicone Putty with Clay

• Ensure your clay model is dry and free from loose debris for the best mould finish.
• Mix the putty thoroughly (1:1 ratio), and work quickly – you’ll get around 20 minutes before it begins to set.
• No extra release agent is typically required; the putty is designed to peel away cleanly from most clay surfaces.
• Once cured, the mould can be used for casting with resins, wax, or other compatible materials.