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RTV 23 Additives

This section contains the additives and catalysts specifically designed for use with the RTV 23 Silicone mould making system. Choosing the right additive allows you to control cure speed and consistency, giving you the flexibility to tailor the silicone's behaviour to your working conditions and project requirements.

We stock three key additives for the RTV 23 system: RTV Fast Catalyst (Yellow) for a shorter pot life and faster demould time, RTV Slow Catalyst (Green) for extended working time on larger or more complex moulds, and RTV Thixotropic Additive for brush-applied work, thickening the silicone to prevent sagging or running on vertical surfaces and intricate patterns.

All additives are supplied with fast UK delivery from CFS Fibreglass. If you need guidance on mixing ratios or which catalyst to use for your application, our technical team is on hand to help - call us on 01209 821028 or email sales@cfsnet.co.uk.

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