Liquid Silicones: Uses & Practical Guide for Mould Making

← Back to What is meant by silicone rubber?

Liquid silicones are incredibly versatile materials especially prized for their role in mould making. These flexible rubbers allow users to produce detailed, reusable moulds for an array of creative and practical applications.

What Are Liquid Silicones?

Liquid silicones are two-component systems that cure from a fluid state into flexible, rubber-like solids. They are most often used for crafting moulds which can be used repeatedly for casting resins, wax, plaster, cement, or even soap. Their ability to capture fine details and undercuts is a key reason for their popularity in hobby and professional settings alike.

Choosing the Right Liquid Silicone for Mould Making

When selecting a liquid silicone, consider the required detail of your mould, compatibility with your casting materials, and your desired working time. For example, the “Pure Mould” – Translucent Liquid Silicone Rubber for Mould Making offers a simple 1:1 mix ratio and cures in just a few hours, making it excellent for both beginners and advanced users. If you require the ability to cast objects with intricate designs, a product such as “Liquid Mould” with a wider range of shore hardness may be suitable.

Tips for Successful Use

Always measure and mix components carefully, following the product instructions for optimal results.
Use a clean container and tools to avoid contamination in your silicone mix.
To minimise bubbles, mix slowly and thoroughly; consider using a pressure pot for demanding detail work.
Cure times can vary. Avoid disturbing the silicone until fully set, which can take anywhere from a few hours to overnight.

When This Matters

Understanding liquid silicones is important when you need to create durable, detailed, and reusable moulds for small objects, jewellery, candles, or prototypes. You’ll particularly notice their advantages if you regularly cast with resins, waxes, or plasters and require a material that resists wear and provides consistent results.

Related guides

What Is Meant By Silicone Rubber

Whether you’re a hobbyist or professional, choosing the right liquid silicone makes all the difference in mould making. For more on this topic and related materials, see our main guide on what is meant by silicone rubber.