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Key Differences
| Mixed Viscosity | 150 cps | 100 cps |
| Pot Life | 20 minutes | 5 minutes |
| Color | White | Black |
| Tensile Modulus | 290,000 psi | 374,000 psi |
| Elongation @ Break | 6 % | 3 % |
| Compressive Strength | 8,300 psi | 11,400 psi |
| Compressive Modulus | 78,000 psi | 97,900 psi |
| Shrinkage | 0.0025 in. / in. | 0.012 in. / in. |
Disclaimer
Although we do our best to ensure accuracy, Smooth-On offers no warranties, promises, and/or representations of any kind, either expressed or implied, as to the accuracy, completeness, or reliability of the information contained on this Compare Tool, nor suitability of the information contained herein to your particular circumstances. Smooth-On assumes no liability for losses or damages of whatever nature (direct, indirect, consequential or other) associated with your use, or inability to use, the Compare Tool, or from your use (or failure to use) the information contained herein. Other useful tools include product technical bulletins and our extensive FAQ section. You can also contact our technical support team.All Technical Data
| TASK™ 3 | Smooth-Cast™ ONYX™ SLOW | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 150 cps | 100 cps |
| Mix Ratio By Volume | 1A:1B | 100A:100B |
| Mix Ratio By Weight | 115A:100B | 120A:100B |
| Pot Life | 20 minutes | 5 minutes |
| Cure Time | 90 minutes | 90 minutes |
| Shore D Hardness | 80 | 80 |
| Specific Gravity | 1.12 g/cc | 1.09 g/cc |
| Specific Volume | 24.7 cu. in./lb. | 27.7 cu. in./lb. |
| Color | White | Black |
| Tensile Strength | 6,650 psi | 7,660 psi |
| Tensile Modulus | 290,000 psi | 374,000 psi |
| Elongation @ Break | 6 % | 3 % |
| Compressive Strength | 8,300 psi | 11,400 psi |
| Compressive Modulus | 78,000 psi | 97,900 psi |
| Flexural Strength | 9,500 psi | 10,230 psi |
| Flexural Modulus | 288,000 psi | 286,000 psi |
| Shrinkage | 0.0025 in. / in. | 0.012 in. / in. |
| Heat Deflection Temp | 134 °F | — |
| Heat Deflection With Post Cure | — | 212 °F |
Product Description
TASK™ 3
TASK™ 3 low viscosity, high performance casting resin offers superior physical and performance properties compared to our popular Smooth-Cast™ Series of general purpose casting resins. Vacuum degassing is not necessary and it offers the convenience of a 1A:1B by volume (115A:100B by weight) mix ratio.
TASK™ 3 is white. It has high tensile and flexural strength, as well as high flexural modulus. This plastic was formulated for a variety of industrial applications including pattern making and making prototype models. This resin is designed for casting in thicknesses up to ½” (1.27 cm). TASK™ Plastics are moderately priced and are available in trial kits, one-gallon, five-gallon, 55-gallon drum and totes.
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Smooth-Cast™ ONYX™ SLOW
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. ONYX™ SLOW resin has a pot life of 5 minutes and a cure time of 90 minutes.