Smooth-Cast ONYX Series

Ultra-Black Urethane Resins

Smooth-Cast® ONYX™ is a mercury-free urethane resin that cures quickly at room temperature to a deep black, solid plastic. ONYX™ offers a higher heat resistance, up to 250°F/121°C, and the cured plastic can be polished. Applications include reproducing sculpture, making prototypes and potting / encapsulation. Due to it’s quick cure time and hardness, ONYX™ FAST is a good choice for creating fast cold cast bronze, brass, copper, nickel/silver, etc. effects.

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Smooth-Cast® ONYX™ FAST

Fast-setting BLACK low viscosity liquid plastic. 1A:1B by volume mix ratio.
How Does It Work?
WARNING: Known to the state of CA to cause cancer, birth defects or reproductive harm - www.P65Warnings.ca.gov
Trial Unit 2.2 lbs. 3361
Gallon Unit 16.5 lbs. 14847
5 Gallon Unit 82.5 lbs. 66206

Smooth-Cast® ONYX™ SLOW

Medium-setting BLACK low viscosity liquid plastic. 1A:1B by volume mix ratio.
How Does It Work?
Trial Unit 2.2 lbs. 3320
Gallon Unit 16.5 lbs. 14540
5 Gallon Unit 82.5 lbs. 65160