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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 430 cps | 7,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 7 minutes | 20 minutes |
| Barcol 935 Hardness | — | 93 |
| Shore D Hardness | 61 | — |
| Specific Volume | 26.4 cu. in./lb. | 18.22 cu. in./lb. |
| Color | Translucent White | Black |
| Shrinkage | 0.012 in. / in. | 0.001 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 | EpoxAcast™ 650 BLACK + 101 Hardener | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 430 cps | 7,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 100A:93B | 100A:12B |
| Pot Life | 7 minutes | 20 minutes |
| Cure Time | 60 minutes | 1 hour |
| Barcol 935 Hardness | — | 93 |
| Shore D Hardness | 61 | — |
| Specific Gravity | 1.05 g/cc | 1.52 g/cc |
| Specific Volume | 26.4 cu. in./lb. | 18.22 cu. in./lb. |
| Color | Translucent White | Black |
| Tensile Strength | 2,420 psi | — |
| Tensile Modulus | — | 1,503,000 psi |
| Ultimate Tensile | — | 6,000 psi |
| Tensile Elongation | — | 0.42 % |
| Elongation @ Break | 100 % | — |
| Compressive Strength | — | 16,350 psi |
| Compressive Modulus | — | 142,600 psi |
| Flexural Strength | — | 5,890 psi |
| Flexural Modulus | — | 710,000 psi |
| Shrinkage | 0.012 in. / in. | 0.001 in. / in. |
| Heat Deflection Temp | — | 129 °F |
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.
EpoxAcast™ 650 BLACK + 101 Hardener
EpoxAcast™ 650 BLACK is a mineral filled general purpose casting epoxies that is low cost and versatile. It features a low mixed viscosity for minimal bubble entrapment. Choose Fast, Medium or Slow catalyst to fit your project. You can also use HT Hardener to give your castings higher heat resistance. EpoxAcast™ 650 BLACK are used for making hard dies for metal stamping as well as patterns and fixtures. They are also used for electrical encapsulation to extend the life cycles and enhance the performance of potted electronic devices. The high compressive strength of EpoxAcast™ 650 BLACK makes it ideal for making stamping dies for production pressing of metal ornaments.