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Understanding how long silicone moulds take to cure is essential for planning your mould making projects. Cure times vary between different silicone products, so it’s important to choose the right option to fit your schedule and application.
Cure Times for Silicone Putty and Liquid Rubber
Silicone putties like I–Gum are designed for rapid projects, typically curing between 20 to 40 minutes after mixing. This makes putty ideal for straightforward, quick-moulding tasks. In contrast, liquid silicone rubbers such as Pure Mould and Liquid Mould require a longer setting period, generally taking between 3 to 12 hours to fully cure, depending on the specific formula and room conditions such as temperature and humidity.
Tips for Successful Mould Curing
- Mixing Accuracy: Always follow the recommended mixing ratios, whether it’s the 1:1 ratio for most putties or the two-part mixing instructions for liquids.
- Ambient Temperature: Warmer environments usually result in faster cure times, while cooler conditions may prolong the process.
- Patience and Timing: Do not attempt to demould too early, as the silicone may not have reached optimal strength. Refer to each product’s guidance for minimum and ideal curing durations.
When Timing Matters Most
Project deadlines, complex detail requirements, or multi-stage casting all make knowing your silicone’s cure times crucial. If you need a fast turn-around, silicone putties are your best option, while larger or more intricate moulds may be best achieved with a liquid silicone rubber, despite the longer wait.
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Choosing the correct silicone and understanding its cure time ensures smoother mould making and better results. Explore more mould making methods and solutions on our Silicone Putty for Mould Making Solutions hub page.