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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 20,000 cps | 100 cps |
| Mix Ratio By Volume | N/A (gram scale required) | 100A:100B |
| Pot Life | 40 minutes | 5 minutes |
| Cure Time | 24 hours | 90 minutes |
| Shore D Hardness | — | 80 |
| Shore A Hardness | 60 | — |
| Specific Volume | 19.1 cu. in./lb. | 27.7 cu. in./lb. |
| Color | Red | Black |
| Tensile Strength | 398 psi | 7,660 psi |
| Elongation @ Break | 132 % | 3 % |
| Shrinkage | 0.0015 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
| Mold Max™ 60 | Smooth-Cast™ ONYX™ SLOW | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 20,000 cps | 100 cps |
| Mix Ratio By Volume | — | 100A:100B |
| Mix Ratio By Weight | 100A:3B | 120A:100B |
| Pot Life | 40 minutes | 5 minutes |
| Cure Time | 24 hours | 90 minutes |
| Shore D Hardness | — | 80 |
| Shore A Hardness | 60 | — |
| Specific Gravity | 1.45 g/cc | 1.09 g/cc |
| Specific Volume | 19.1 cu. in./lb. | 27.7 cu. in./lb. |
| Color | Red | Black |
| Die B Tear Strength | 63 pli | — |
| Tensile Strength | 398 psi | 7,660 psi |
| Tensile Modulus | — | 374,000 psi |
| Elongation @ Break | 132 % | 3 % |
| 100% Modulus | 331 psi | — |
| Compressive Strength | — | 11,400 psi |
| Compressive Modulus | — | 97,900 psi |
| Flexural Strength | — | 10,230 psi |
| Flexural Modulus | — | 286,000 psi |
| Shrinkage | 0.0015 in. / in. | 0.012 in. / in. |
| Useful Temperature (min) | -65 °F | — |
| Useful Temperature (max) | 560 °F | — |
| Dielectric Constant, 100Hz | 3.4 | — |
| Dielectric Strength | >500 volts/mil | — |
| Dissipation Factor, 100Hz | 0.02 | — |
| Heat Deflection With Post Cure | — | 212 °F |
| Thermal Conductivity | 0.347 W/M*K | — |
| Volume Resistivity | 9.000000E+14 ohm/cm | — |
Product Description
Mold Max™ 60
Mold Max™ 60 is a Shore 60A tin catalyzed silicone mold rubber formulated for applications requiring high heat resistance (up to 560°F/294°C). It features a low mixed viscosity and cured rubber exhibits very low linear shrinkage. Parts A & B are mixed 100A & 3B by weight. Pot life is 40 minutes and cure time is 24 hours. Applications include making foundry patterns, flat pattern reproductions and casting low-melt metal alloys such as tin and pewter.
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.