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When working with liquid silicone rubber for mould making, it’s important to know whether you must add anything to the base material in order to achieve an effective cure. Here’s what you need to know about additives and preparing your silicone for perfect results.
Understanding Bi-Component Silicone Systems
Most liquid silicone rubbers for moulds, such as “Liquid Mould” – Casting Liquid Silicone Rubber, 5-40 Shores, Bi-Component A+B, are bi-component materials. This means the product is supplied in two separate parts—typically labelled ‘A’ (the base) and ‘B’ (the catalyst or hardener). The silicone will not cure unless the catalyst is thoroughly mixed with the base in the ratio specified by the manufacturer. No additional additives are needed beyond combining these two components.
Mixing Guidance for Best Outcomes
Successful results depend on accurate mixing. Always check the recommended mixing ratio, which is usually 1:1 by weight or volume for products like “Pure Mould”. Use clean tools and a mixing container to blend both parts until the colour is uniform, ensuring the catalyst is fully incorporated. Begin pouring into your prepared mould immediately, as working time may be limited. It’s also worth noting that most silicone systems do not require further additives such as release agents, though a release spray may be helpful if using certain types of masters.
When This Matters Most
Adding the correct catalyst is essential for anyone looking to achieve reliable curing and fine detail in their silicone moulds. Skipping or mismeasuring the catalyst will result in an incomplete set, leading to wasted material and time. This is particularly important for intricate, highly detailed projects or when multiple reproductions are required.
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Knowing that liquid mould silicone rubber requires only its accompanying catalyst, without any extra additives, will help you achieve precise, consistent results. For more buying options or help with mould-making materials in Milan, visit our main page on where to buy silicone mould rubber in Milan.