High Temperature Silicone-Rubber Molding Compound


EZ-Cast 580N, a new high temperature silicone-rubber molding compound, produced by Aremco Products, Inc., is now used to fabricate high tear strength, flexible molds for casting ceramic fixtures. EZ-Cast 580N is ideal for producing high reliability master molds for casting ceramic fixtures. Material properties include a maximum temperature resistance of 400°F (204ºC), Shore “A” Durometer of 40, tensile shear strength of 700 psi minimum, and tear strength of 110 minimum lb/in.

EZ-Cast 580N is supplied as a two-part system that mixes in a ratio of 10 lbs resin to 1 lb catalyst. It sets in 24 hours at room temperature or in 4 hours at 120ºF.

EZ-Cast 580N is available from stock in pint, quart, and gallon kits.



  • silicone rubber molding compound
  • creates high tear strength flexible molds
  • resists 400°F
  • 40 Shore “A” Durometer
  • 700 psi minimum tensile shear strength
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