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Prototype Molding

ELASTOSIL® M silicone rubber grades are some of the highest quality, most technically advanced materials used in vacuum casting. The properties of pourable, addition-curing ELASTOSIL® M silicone rubber have been specially tailored to the needs of vacuum casting for rapid prototyping and small-series production.

Benefits:

  • Good flow
  • Fast, shrink-free curing at room temperature, which can be greatly accelerated by heating
  • High transparency
  • High tear resistance
  • Outstanding long-term stability of the cured rubber’s mechanical properties
  • Excellent resistance to casting resins and polyamide

Applications:

  • Visualization models
  • Working models
  • Pre-series models
  • Wax models
  • Small series

Product Recommendations

Table is scrollable
Products
Technical data
Product properties
Viscosity, dynamic Tear strength Hardness Shore A Tensile strength Elongation at break Resistance Surface property Regulation Product Rheology Crosslinking Property Vulcanizate
ELASTOSIL® CAT VARIO - - - - - - - - - - - - - - - -
ELASTOSIL® CAT VARIO-F - - - - - - - - - - - - - - - -
ELASTOSIL® M 4641 A/B 50000 mPa·s[1] 50000 mPa·s[1] > 25 N/mm[4] > 25 N/mm[4] 43[5] 43[5] > 4.5 N/mm²[7] > 4.5 N/mm²[7] > 300 %[9] > 300 %[9] Resistance against PU Dry surface Food-contact Flowable No chemical shrinkage, Two-component, Addition Curing Highly transparent
ELASTOSIL® M 4644 A/B 70000 mPa·s[1] 70000 mPa·s[1] > 25 N/mm[4] > 25 N/mm[4] 40[5] 40[5] 5.5 N/mm²[7] 5.5 N/mm²[7] 400 %[9] 400 %[9] Resistance against PU Slightly oil bleeding - Flowable No chemical shrinkage, Two-component, Addition Curing Highly transparent
ELASTOSIL® M 4645 A/B 50000 mPa·s[1] 50000 mPa·s[1] > 28 N/mm[4] > 28 N/mm[4] 40[5] 40[5] 5 N/mm²[7] 5 N/mm²[7] 330 %[9] 330 %[9] Resistance against PU Strong oil bleeding - Flowable No chemical shrinkage, Two-component, Addition Curing Highly transparent
ELASTOSIL® M 4670 A/B 120000 mPa·s[1] 120000 mPa·s[1] 15 N/mm[4] 15 N/mm[4] 55[6] 55[6] 5.5 N/mm²[8] 5.5 N/mm²[8] 280 %[10] 280 %[10] Resistance against polyester, Resistance against epoxy resins, Resistance against PU Dry surface Food-contact Flowable No chemical shrinkage, Two-component, Addition Curing -
ELASTOSIL® VARIO 15 5.000 mPa·s[2] 5.000 mPa·s[2] 15[4] 15[4] 15[6] 15[6] 6.5 N/mm²[8] 6.5 N/mm²[8] 900 %[10] 900 %[10] - - Food-contact Flowable No chemical shrinkage, Two-component, Addition Curing -
ELASTOSIL® VARIO 40 15.000 mPa·s[3] 15.000 mPa·s[3] 15 N/mm[4] 15 N/mm[4] 40[6] 40[6] 8 N/mm²[8] 8 N/mm²[8] 450 %[10] 450 %[10] - - Food-contact Flowable No chemical shrinkage, Two-component, Addition Curing -
SILESTER® AR - - - - - - - - - - - - - - - -
Legend
[1] Viscosity, dynamic after stirring | 23 °C | ISO 3219,  [2] Viscosity, dynamic 23°C, stirred | ISO 3219,  [3] Viscosity, dynamic 23° C, stirred | ISO 3219,  [4] Tear strength | ASTM D 624 B,  [5] Hardness Shore A | ISO 868,  [6] Hardness Shore A | DIN ISO 48-4,  [7] Tensile strength | ISO 37,  [8] Tensile strength | ISO 37 type 1,  [9] Elongation at break | ISO 37,  [10] Elongation at break | ISO 37 type 1