Smooth Cast ONYX Slow

Unit Size	Net Weight
Pint Kit	2.2 lb
Gallon Kit	16.5 lb
Five Gallon Kit	82.5 lb

 

Smooth-Cast ONYX¨ SLOW is a mercury-free Ultra-Black urethane resin that cures quickly at room temperature to a deep black, solid plastic. Applications include reproducing sculpture, making prototypes and potting / encapsulation. Because ONYX¨ is a fast curing resin and becomes hard quickly, it is also great for doing fast cold cast bronze, brass, copper, nickel/silver, etc. ONYX¨ offers the convenience of a 1A:1B by volume mix ratio and has a very low viscosity, so it is easy to mix and pour. ONYX¨ has an ultimate shore hardness of 80D and offers higher physical properties and higher heat resistance vs. other general purpose resins.

Technical Properties

Mix Ratio by Weight	120A:100B
Mix Ratio by Volume	100A:100B
Pot Life	5 minutes
Cure Time	90 minutes
Color	Black
Shore Hardness	80D
Mixed Viscosity	100 cps
Specific Volume	27.7 cu. in./lb.
Specific Gravity	1.09g/cc
Tensile Strength	7,660 psi
Elongation @ Break	3%
Compressive Modulus	97,900 psi
Tensile Modulus	374,000 psi
Flexural Strength	10,230 psi
Flexural Modulus	286,000 psi
Compressive Strength	11,400 psi
Heat Deflection Temp	212¼F

 

Advantages that ONYX¨ offers over other resins :
1) if you desire a black casting, adding color pigment is not necessary
2) cured plastic is ultra-black and darker than competitive black resins
3) cured ONYX¨ plastic can be polished and buffed to a high gloss shine
4) ONYX¨ offers higher heat resistance (to 200¡F /94¡ C at room temperature) vs. competitive black resins
5) unlike other black resins, ONYX¨does not contain mercury
6) ONYX¨ is less expensive vs. other black resins.
How do I remove release agent from my cured urethane casting if I want to prime or paint the casting?
Removing a silicone-based release agent from your cured urethane casting is not easy. The most effective way is to sand blast or bead blast the surface of your casting. However, sand blasting removes a micro thin layer of the castingÕs surface. If not done properly, you can damage or remove fine detail. Soap Wipe or brush the casting with a soap that has high alkali content. Cascade brand dishwashing gel is highly alkaline and also contains baking soda, which is an advantage. Solvents Wipe or brush the casting with Acetone, Toluene, Isopropyl Alcohol or Mineral Spirits.
Important: follow all safety precautions when using flammable liquids. You can then prime and paint your casting.

Technical Bulletin

PRODUCT ADVISORY:
The products listed below are currently SPECIAL ORDER items and require pre order.
Lead times may vary - For more information please contact our staff.

799752 - Smooth Cast ONYX Slow - Five Gallon Kit