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™ resins are available in 2 speeds.
Advantages that ONYX™ resins offer over other resins:
- if you desire a black casting, adding color pigment is not necessary
- cured plastic is ultra-black and darker than competitive black resins
- cured ONYX™ plastic can be polished and buffed to a high gloss shine
- ONYX™ offers higher heat resistance vs. competitive black resins
- unlike other black resins, ONYX® does not contain mercury
- ONYX™ is less expensive vs. other black resins.
Applications include reproducing sculpture, making prototypes and potting / encapsulation. Due to it's quick cure time and hardness, ONYX™ is a good choice for creating fast cold cast bronze, brass, copper, nickel or silver effects.
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Liquid PlasticI FOUND WEIGHT MIXING WITH THE ONYX WAS BEST , HAPPY WITH THE REPRODUCTION OF SMALL PARTS FROM THE MOULDS.
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Easy to use but some stickynessWorks well, easy to use, measure, mix and pour.
One problem for my application - filling in some worn areas in wood - was that, while it cures as stated in the instructions it developed a sticky tacky surface which I'm not sure Ill be able to sand down given the gooey surface,
Fortunately I tried a test application first. Can you offer some advice as to how to overcome this effect. -
Fast Onyx BlackHave been using Smooth Cast 300 (white) which is borderline too fast to use and this is even faster. Even at 1:1 by weight. So if you need any time to mix etc, use the Onyx Black Slow.