Moulding and Casting

SILICONE RUBBER

Silicone casting rubbers are used for a variety of moulding and tooling applications ranging from the development of prototype parts to production moulds. They offer excellent release characteristics. Ideal for casting epoxy, polyester and polyurethane resin systems. An advantage of using silicones over urethanes in mould making is that they are self-releasing. Usually, no mould release is required to separate the silicone mould from the model.  There are two families of silicone, tin cure and platinum cure. Tin cure silicone, also known as Condensation curing silicone, cures by extracting moisture from the air. Platinum cure silicone, also known as addition curing silicone, is typically more expensive, but has a lower percentage of shrinkage during the cure phase.

- Useful tool: Estimating the amount of liquid rubber you need

Tin / Condensation Cure Silicones
- Mold Max Silicone Rubber

Platinum / Addition Cure Silicones
- Dragon Skin / Sorta-Clear 40 / Smooth-Sil

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