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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 20,000 cps | 1,800 cps |
| Mix Ratio By Volume | N/A (gram scale required) | 1A:1B |
| Pot Life | 40 minutes | 30 minutes |
| Cure Time | 24 hours | 16 hours |
| Shore A Hardness | 60 | 30 |
| Specific Volume | 19.1 cu. in./lb. | 26.7 cu. in./lb. |
| Color | Red | Clear Amber |
| 100% Modulus | 331 psi | 82 psi |
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 | PMC™-121 30/WET | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 20,000 cps | 1,800 cps |
| Mix Ratio By Volume | — | 1A:1B |
| Mix Ratio By Weight | 100A:3B | 1A:1B |
| Pot Life | 40 minutes | 30 minutes |
| Cure Time | 24 hours | 16 hours |
| Shore A Hardness | 60 | 30 |
| Specific Gravity | 1.45 g/cc | 1.04 g/cc |
| Specific Volume | 19.1 cu. in./lb. | 26.7 cu. in./lb. |
| Color | Red | Clear Amber |
| Die B Tear Strength | 63 pli | — |
| Die C Tear Strength | — | 75 pli |
| Tensile Strength | 398 psi | 400 psi |
| Elongation @ Break | 132 % | 1,000 % |
| 100% Modulus | 331 psi | 82 psi |
| Shrinkage | 0.0015 in. / in. | < .001 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 | — |
| 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.
PMC™-121 30/WET
The PMC™-121 Series urethane rubbers feature convenient one-to-one by volume mix ratios. PMC™-121/30 Wet is exceptionally strong and abrasion resistant for soft urethane mold rubbers. It exudes oil that aids in demolding hard plasters and concrete.