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All Technical Data

Smooth-Cast® ONYX™ FAST
Product Type
  • Urethane Resins
Mixed Viscosity100 cps
Mix Ratio By Volume100A:100B
Mix Ratio By Weight120A:100B
Pot Life2.5 minutes
Cure Time15 minutes
Shore D Hardness80
Specific Gravity1.09 g/cc
Specific Volume27.7 cu. in./lb.
Tensile Strength5,840 psi
Tensile Modulus246,000 psi
Elongation @ Break4 %
Compressive Strength8,760 psi
Compressive Modulus77,400 psi
Flexural Strength8,280 psi
Flexural Modulus246,000 psi
Shrinkage0.010 in. / in.
Heat Deflection With Post Cure250 °F

Product Description

Smooth-Cast® ONYX™ FAST

Smooth-Cast® ONYX™ is a mercury-free urethane resin that cures at room temperature to a deep black, solid plastic. ONYX™ resins offer the convenience of a 1A:1B by volume mix ratio and have very low viscosities, so they are easy to mix and pour. ONYX™ resins have an ultimate Shore hardness of 80D and offer higher physical properties and higher heat resistance vs. other general purpose resins.ONYX™ FAST resin has a pot life of 2.5 minutes and a cure time of 10-15 minutes. ONYX™ FAST is a good choice for creating fast cold cast bronze, brass, copper, nickel/silver, etc. effects.

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