1. Mixing the two components
BLUESIL RTV 3440, 3445, 3450, 3450 QC A&B are mixed by weight in the above indicated ratio. The mixing can be carried out either by hand or using a low-speed electric or pneumatic mixer to minimise the introduction of air and to avoid any temperature increase.
It is also possible to use a special mixing and dispensing machine for the two silicone components. Further information is available upon request.

2. Degassing
The mixture should be degassed preferably at 30 to 50 mbar to eliminate any entrapped air. If a dispensing machine is used, the two components are degassed separately prior to mixing.
The silicone mixture expands to times of its initial volume and bubbles rise to the surface.
The bubbles progressively disappear and the mixture returns to its initial volume after 5 to 10 minutes. Wait a few minutes to complete the degassing and then flash the vacuum. The silicone is ready for pouring, either by gravity or under low pressure.
Note: Flashing the vacuum once or twice accelerates the degassing. It is recommended to use a container with a high diameter / height ratio.

3. Polymerisation
BLUESIL RTV 3440, 3445, 3450, 3450 QC A&B polymerises at 23 °C. The curing may be slowed down at lower temperature and contrary accelerated by heat.
Contact with certain materials can inhibit the crosslinking. See list below:

  • natural rubbers vulcanised with sulphur,
  • RTV 2 silicone elastomers catalysed with metal salts, e.g. tin-compounds,
  • PVC stabilised with tin salts and additives,
  • epoxy resins catalysed with amines,
  • some organic solvents, e.g. ketones, alcohols, ether etc.

In case of doubts, it is recommended to test the substrate by applying a small quantity of the mixed silicone on a restricted area.


STORAGE -10°C < t < +30°C IN ITS ORIGINAL PACK STIR WELL BEFORE USENo special storage precautions noted. Material is stable under normal conditions. Avoid contact with oxidizing agents. Suitable containers: polyethylene. Plastic lined steel drum.请查阅这个产品的物质安全数据表欧盟《电气、电子设备中限制使用某些有害物质指令》


BLUESIL RTV 3440, 3445, 3450, 3450 QC A&B are two component silicone elastomers that crosslink at room temperature by polyaddition reaction. The polymerisation can be accelerated by heat. The silicone materials are delivered as two viscous liquid components, which once mixed and cured, transform into an elastic and resistant elastomer. Polymerisation occurs without production of heat.





  • Highly accurate reproductions
  • Dimensional stability
  • Good mechanical properties combined with a high Shore A
  • Chemical and thermal resistance
  • Fast mixing and easy processing due to the low viscosity

Reproduction of various kinds of 3D objects in:

  • Plaster
  • Wax
  • Polyester
  • Low melting point metals






粘度40000PairedCompBSI HL 019mPa.s




粘度500PairedCompBSI HL 019mPa.s






pot-life_0d649a54-7503-4c7c-a047-9d0c4b3e9f6apot-life_0d649a54-7503-4c7c-a047-9d0c4b3e9f6a适用期90PairedMixBSI HL 016min
hardness_cd523e03-72a3-4261-93f9-36f7bbeeafb1hardness_cd523e03-72a3-4261-93f9-36f7bbeeafb1硬度40PairedMixDIN 53505邵氏A





BLUESIL RTV 3440 BBLUESIL RTV 3440 B/our_offer/Product/90003333/90003332/BLUESIL-RTV-3440-B