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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 430 cps | 45,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 7 minutes | 45 minutes |
| Cure Time | 60 minutes | 24 hours |
| Shore D Hardness | 61 | — |
| Shore A Hardness | — | 40 |
| Color | Translucent White | Mint Green |
| Tensile Strength | 2,420 psi | 550 psi |
| Elongation @ Break | 100 % | 250 % |
| Shrinkage | 0.012 in. / in. | 0.004 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
| Smooth-Cast™ 61D | Mold Max™ 40 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 430 cps | 45,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 100A:93B | 100A:10B |
| Pot Life | 7 minutes | 45 minutes |
| Cure Time | 60 minutes | 24 hours |
| Shore D Hardness | 61 | — |
| Shore A Hardness | — | 40 |
| Specific Gravity | 1.05 g/cc | 1.14 g/cc |
| Specific Volume | 26.4 cu. in./lb. | 24.3 cu. in./lb. |
| Color | Translucent White | Mint Green |
| Die B Tear Strength | — | 120 pli |
| Tensile Strength | 2,420 psi | 550 psi |
| Elongation @ Break | 100 % | 250 % |
| 100% Modulus | — | 190 psi |
| Shrinkage | 0.012 in. / in. | 0.004 in. / in. |
| Useful Temperature (min) | — | -65 °F |
| Useful Temperature (max) | — | 400 °F |
| Dielectric Constant, 100Hz | — | 3.29 |
| Dielectric Strength | — | 330 volts/mil |
| Dissipation Factor, 100Hz | — | 0.005 |
| Volume Resistance | — | 8.29E+11 ohm |
| Volume Resistivity | — | 5.83E+13 ohm/cm |
Product Description
Smooth-Cast™ 61D
The Smooth-Cast™ Semi-Rigid line of low-cost semi-rigid urethane casting resins cure quickly to semi-rigid plastics that offer exceptional strength and impact resistance.
New Formulations – New Look!
Smooth-Cast™ 61D is newly reformulated with a translucent white appearance and improved physical properties. All Smooth-Cast semi rigids are now mercury free and phthalate free. These plastics are easy-to-use (mix ratio is 1A:1B by volume) and have low viscosities for minimal bubble entrapment. Vibrant colors are possible by adding SO-Strong™, UVO™ or Ignite™ colorants.
These semi-rigid plastics are good for making impact resistant prototypes, models, toys, props, climbing holds, etc.
› Click here for more Smooth-Cast™ resin products.
Mold Max™ 40
Mold Max™ Silicones are tin-cured silicone mold rubber compounds that have exceptional working properties and library life. Mold Max™ Silicones feature Smooth-On’s exclusive “Libra™” catalyst for long library life. Mold Max™ silicones can be pigmented with Silc Pig™ silicone colorants. Pot life for the pourable silicones is 45 minutes and they cure overnight at room temperature.
Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.