Silicone Moulding Rubber (RTV C30)

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Silicone Moulding Rubber

RTV C30 is an easy to use cold cure condensation silicone rubber elastomer often called Room Temperature Vulcunising (RTV) rubber. This results in a flexible elastic material with excellent tear resistance.

RTVC30 comes with a thixotropic . These additions improve the thickness and curing rate respectively.A silicone oil is also available to reduce viscosity and hardness


  • Easy to mix and pour ( 45 000 Cps viscosity)
  • High tear resistance
  • Good elasticity
  • Excellent release properties


  • Building and Film Industry
  • Sculpture
  • Interior Decorating
  • Figurines and resin casting
Mixing Ratio to Hardner (Parts by weight)
100:1%-2.5% ( up to 3%) for RTVCAT 5
Pot Life (Hrs)
15 - 20 min with CAT 5 @ 2.5%
45 min with 1.25% CAT 5
Re apply Time ( Tack off time)
2 - 5 Hours with CAT5
Full Cure
6 - 24 Hours ( depending on catalyst %)
Tensile Strength (MPa)
Elongation at break %
Shore Hardness A
Linear Shrinkage
0.6 %
Tear Resistance
15 N/mm
Specific Density

Thixotrope for vertical surface use RTVTHX SASIL or RTVTHX C25
1 - 2 %

Twelve months from date of manufacture if kept in closed opaque containers at 20 - 25 Deg C

All statements , technical information and recommendations contained in this publication are based on tests believed to be reliable , but their accuracy and/or complteness are not guaranteed. The user shal determine the suitability of the product for his particular purpose and shall assume all risk and liability in connection therewith.

Several decades of experience have shown that neither condensationcuring RTV C30 silicone rubbers nor their addition-curing counterparts are toxic or irritating as delivered. It is therefore unnecessary to take any special safety measures apart from the normal industrial hygiene precautions.
The catalysts used for condensationcuring grades, on the other hand, which have names starting with a "T," can cause irritation if they come into contact with the skin or eyes in undiluted form.
Some people may even react allergically to them. Therefore take appropriate protective measures. If, despite these measures, undiluted catalyst still comes into contact with the skin, clean the affected area immediately with soap and water. If catalyst enters the eyes, irrigate them immediately with copious amounts of water for several minutes. If irritation still occurs, seek medical advice at once.