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It is advised to remix both base and catalyst before mixing them together.
1. Mixing of the two components

To 100 parts of BLUESIL RTV 3310 add 5 parts of catalysts BLUESIL CATA 6H or BLUESIL CATA 24H. The two components are thoroughly mixed either using an electrical or pneumatic mixer on a low speed setting so as to limit the inclusion of air in the mixture as well as temperature rise.

2. Degassing
After mixing base and catalyst, it is recommended to degas to eliminate entrapped air. If the processing is done with the help of a machine both parts are degassed before mixing. The BLUESIL RTV 3310 is degassed under vacuum pressure of 30 to 50 mbar. Under vacuum pressure, the product will expand 3 at 4 times its initial volume and forms bubble on its surface. These bubbles will disappear gradually and the mixture will sink back down to its initial volume within 5 to 10 minutes. Release the vacuum and repeat the operation a few minutes later.
Remark: release the vacuum several times improves the degassing. For easier degassing only fill a recipient to 1/3 of its height.

3. Cross linking
The best curing conditions are at 23°C and 50 % relative humidity. The use of products at higher temperatures and/or relative humidity levels will reduce the pot life and increase the setting rate. As opposed to this, lower temperatures and relative humidity levels will increase the pot life and decrease the setting time. It is recommended not to use the product at temperatures below 20°C; under these conditions, the final product performance levels will be difficult to achieve.
At 23°C and 50 % relative humidity, the membranes can be de-moulded after 16 to 24 hours. In order to achieve the best possible performance levels from the membranes, it is
preferable to wait for 24 hours before using them. The definitive properties will be acquired after 3 days.
Remark: Part used drums should be resealed between each use.

4. How to use

Apply BLUESIL RTV 3310 mixed with BLUESIL CATA 6H or BLUESIL CATA 24H directly on the model by casting, trying to avoid bubbles and voids. Even though silicone is naturally no-adhering to most materials, it is always recommendable to prepare the model to avoid any risk of the silicone sticking and so damaging the model. Remove dust and apply a pore filler like soapy water, waxes diluted in xylene, etc.
Part used drums should be resealed between each use.

Please consult the Safety Data Sheet of this product.


BLUESIL RTV 3322 is a silicone elastomer which, after the addition of catalysts BLUESIL 24H or BLUESIL 6H, cures at room temperature and leads to a flexible and elastic material

2 Part RTV


Easy demolding thanks to the intrinsic release properties of silicone elastomers.

Excellent reproduction of details.

Easy processing.

High flexibility and mechanical resistance.

Moulds for the production of parts made of different materials, such as plaster, wax, acrylic resin, polyester resin, epoxy resin, as well as silicone elastomers, with  following application examples:

  • Decoration items: cornices, , ornaments, statues,  
  • Figurines: toys, candles, statues, giftware,
  • Furnishing: furniture and decorative parts,
  • Construction: decorative items, pavement, paving stone, columns, 
  • Artistic foundries: molds for the lost wax casting technique.

Asia Pacific;Europe Middle East Africa;Central and South America

For information about Storage and Shelf Life for this product, please download the Technical Data Sheet.




ColorYellow / ColourlessPairedComp














BLUESIL RTV 3325BLUESIL RTV 3325/our_offer/Product/90000419/90039341/BLUESIL-RTV-3325














Ditta Mancini Agnese, art foundry processing specialist,-art-foundry-processing-specialist.aspxDitta Mancini Agnese, art foundry processing specialist
The Cinema and Miniature Museum Cinema and Miniature Museum



















The Cinema and Miniature Museum2017-02-27T23:00:00ZSince 2007, Bluestar Silicones is in partnership with the Museum of the miniature for the restoration of the works of the cinema section.Since 2007, Bluestar Silicones is in partnership with the Museum of the miniature for the restoration of the works of the cinema section.The Cinema and Miniature Museum