Liquid Silicone Rubbers

How Liquid Silicone Rubbers Work

Liquid silicone rubbers typically use a two-part system: the silicone base and a catalyst or hardener. When mixed in the recommended ratio—most commonly 1:1—the chemical reaction begins, leading to curing and the formation of a flexible, shape-retaining mould. The catalysis process can vary depending on formulation; for instance, products like Pure Mould Translucent Liquid Silicone Rubber cure within 3 to 8 hours, offering an efficient turnaround for many projects.

Using Liquid Silicone Rubbers for Mould Making

To use, carefully mix the two components following the product instructions to ensure even distribution of the catalyst. Pour or brush the mixed liquid over your prepared model, making sure to eliminate air bubbles for sharp details. For very intricate shapes, products like “Liquid Mould” – Casting Liquid Silicone Rubber are designed to flow well and capture fine details and undercuts, making them ideal for resin casting, jewellery, or miniature sculpture work. Always allow the recommended curing time before attempting to demould.

When This Matters: Choosing the Right Silicone

• If you’ll be making multiple copies or need fine accuracy, select liquid silicones specifically rated for detail capture and durability.
• Choose a fast-curing silicone if time is of the essence, but ensure it gives you enough working time to handle your application.
• Consider non-toxic putty-style silicones like “I–Gum” for direct application and small, quick jobs where odour and skin contact are concerns.