Silicone Putty

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Silicone putty is a flexible, dough-like two-part material widely used for making simple, custom moulds by hand. It is valued for its convenience and ease of use in crafting, repairs, and a variety of casting projects.

How Silicone Putty Works

Silicone putty for mould making, such as “I–Gum”, is made of two components that require equal parts mixing by hand (1:1 ratio). After blending the base and catalyst thoroughly, the putty remains pliable for a limited working time—typically around 20 minutes—before setting. This characteristic allows you to quickly shape it over objects to create a negative impression, ideal for capturing fine detail in small items or repeated use.

Practical Applications and Tips

Silicone putty is especially suited to projects involving epoxy resin, wax, polyurethanes, or cement. It’s often used for coasters, crafts, and one-off repairs where fast mould creation is essential. Its non-toxic and odourless formulation means you can work comfortably and with minimal equipment—gloves are usually optional. For best results, make sure to knead until the colour is uniform and apply even pressure for a smooth surface impression.

When Silicone Putty Matters Most

• Quick, on-the-spot mould making where traditional liquid silicone would be less practical
• Projects where limited space or tools make hand mixing and rapid curing preferable
• People seeking a safe, low-odour material for crafting or prototyping at home

Related products

• "I–Gum" – Non-Toxic Silicone Putty for Mould Making
• "Pure Mould" – Translucent Liquid Silicone Rubber for Mould Making

Related guides

• What Is Meant By Silicone Rubber

Silicone putty provides an approachable way to experience the benefits of silicone rubber without complicated setups, making it a perfect introduction to the world of mould making. To learn more about the broader uses and properties of silicone rubber, see our main guide: What is meant by silicone rubber?