ZA 28 Fast Red (28 ShA)

ZA 28 FAST RED is a bi-component (base and catalyst) addition cured RTV silicone rubber which vulcanizes at room temperature. Due to the considerable fluidity it is recommended for the duplication of models with accentuated undercuts.

Main application sectors

  • Mouldmaking and model-making due to its considerable precision in reproduction, high dimensional stability and high mechanical resistance
  • Ceramic serigraphy due to its considerable precision in reproduction, high mechanical resistance and the excellent laser cutting characteristic
  • Tampography due to its high mechanical resistance and excellent ink transfer property


  • High chemical resistance to the aggressive components of some types of resin
  • Good resistance to laceration
  • High level of accuracy in reproducing very small particulars
  • High dimensional stability over time and non-deformability
  • Considerable resistance to high temperatures and to ageing
  • Excellent non-stick effect

Chemical and physical characteristics

 Metric systemUSA system
Mixing ratio1 : 1-
Viscosity of the mix pre-catalisation3600 - 3900 cP-
Specific weight1.13 g/cc-
Mixing time at 23 °C (73 °F)1'-
Working time at 23 °C (73 °F)8’ - 10’-
Setting time at 23 °C (73 °F)1h 30'-
Hardness Shore-A after 24 hours28 ± 2 ShA-
Tensile strenght3.0 ± 0.3 N/mm²435 ± 44 psi
Elongation at break>310%-
Tear resistance>14 N/mm> 79 ppi
The preparation is not considered dangerous according to Directive 67/548/EEC and subsequent amendments.


The ZA 28 Fast Red is guaranteed for a period of 12 months if correctly conserved between 5° - 27°C (41° - 80°F). Close the bottles after use, do not invert the caps or the lids between base and catalyst.

Important observations

The advice given verbally, in writing or through demonstration on how to use the product is based on our knowledge. The use and application by the user occurs without the Company having the possibility to check and therefore remain the responsibility of the user.


DT230725 kg + 5 kg
DT2307325 kg + 25 kg

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