CS25 is an easy-to-use condensation cure (also known as tin cure) RTV silicone rubber suitable for the production of silicone moulds. It cures opaque grey to a 25 shore A (soft flexible) hardness.
Sold as a kit (silicone and catalyst). Available to buy online in 500g, 1kg and 5kg kits.
Easy Composites' CS25 Condensation Cure Rtv Silicone Rubber is a low viscosity, two-part condensation cure silicone rubber. It is used for silicone mould making where it is mixed (with its catalyst) and then poured around a pattern to create a flexible silicone mould.
CS25 has been specially selected for its ease of use, excellent performance and great value.
Once cured the silicone rubber is very soft and flexible making it perfect for casting complicated or intricate shapes where the cast part can be easily removed from the silicone mould. The long pot-life of our silicone allows plenty of time for careful pouring and self de-gassing although forced degassing in a vacuum chamber can also be performed if required.
Typical Uses
The cured mould can then be used to produce precise replicas of the original part, including fine surface detail, out of a range of materials including polyester, epoxy and polyurethane resin, urethane foam, wax, casting plaster, Jesmonite, and reconstituted stone. This Silicone should not be used with Water Clear Casting Resins such as the Water Clear Polyester or Polyurethane Resins as the inherent moisture content of this type of silicone can inhibit the curing of the resin. It can however be used with our GlassCast® clear epoxy range.
Advantages
Further Information
Mixing Ratio
100 p.b.w. CS25 Condensation Cure Silicone Rubber
5 p.b.w. CS25 Condensation Cure Silicone Rubber Catalyst
Brief Description of Typical Use
A part to be copied is positioned within a 'setup box' which will contain the silicone rubber whilst it cures.
The silicone rubber is thoroughly mixed with its catalyst at the correct ratio by weight and then carefully poured all over the surface of the part to be copied (the master). Once the surface of the part is covered the remainder of the silicone is poured into the setup box. The silicone will cure at room temperature in around 24hrs. Once the silicone has cured it is removed from the setup box and then the flexibility of the rubber is used to allow removal of the part from inside the new silicone rubber mould.
An example of a simple mould pour using the CS25 can be seen in the following tutorial video:
How to Make a Silicone Mould
Compatibility Information - Dos and Don'ts
Although by no means an exhaustive list, the mould materials, pigments and additives listed below have all been tested and are known to work well with AS40 Addition Cure Silicone.
Key Processing Information
Pack Size
Easy Composites' CS25 Condensation Cure Silicone Rubber is available in the following pack sizes: 0.5kg, 1kg and 5kg. Please choose the pack size you require from the drop-down list. The 1kg kit is also included in the Xencast Resin Casting Starter Kit .
Any Questions?
The team behind CS25 Condensation Cure Silicone Rubber are on hand to help with any questions you may have, whether you want help with calculating or need advice on mixing, pouring or troubleshooting.
If you need any help or advice just call us, we're here 5 days a week; 8am to 5:30pm (Mon-Fri) and what we don't know about Mould Making and Casting isn't worth knowing!
Delivery
CS25 Condensation Cure Silicone Rubber is held in stock in the Easy Composites warehouse in Stoke on Trent. All orders are dispatched same-day (orders received before 12:00) for next-working day delivery. Because Silicone Rubber is classified as 'dangerous goods' it can only be sent by specialist carrier.
Trade counter collections are welcome; please contact us to arrange.