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Key Differences
| Mixed Viscosity | 23,000 cps | 5,000 cps |
| Barcol 935 Hardness | — | 93 |
| Shore D Hardness | 90 | — |
| Color | Grey | Off White |
| Tensile Modulus | 2,040,000 psi | 1,079,000 psi |
| Ultimate Tensile | 4,810 psi | 6,900 psi |
| Tensile Elongation | 0.54 % | 0.82 % |
| Compressive Strength | 12,500 psi | 15,980 psi |
| Flexural Strength | 7,660 psi | 10,850 psi |
| Flexural Modulus | 1,403,000 psi | 775,000 psi |
| Shrinkage | 0.0006 in. / in. | 0.007 in. / in. |
| Heat Deflection Temp | 135 °F | 187 °F |
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
| EpoxAcast™ 655 + 103 Hardener | EpoxAcast™ 650 + HT Hardener | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 23,000 cps | 5,000 cps |
| Mix Ratio By Weight | 100A:12B | 100A:10B |
| Pot Life | 3.5 hours | 3 hours |
| Cure Time | 24 hours | Twenty Four Hours Followed By Post Cures |
| Barcol 935 Hardness | — | 93 |
| Shore D Hardness | 90 | — |
| Specific Gravity | 1.66 g/cc | 1.52 g/cc |
| Specific Volume | 16.7 cu. in./lb. | 18.22 cu. in./lb. |
| Color | Grey | Off White |
| Tensile Modulus | 2,040,000 psi | 1,079,000 psi |
| Ultimate Tensile | 4,810 psi | 6,900 psi |
| Tensile Elongation | 0.54 % | 0.82 % |
| Compressive Strength | 12,500 psi | 15,980 psi |
| Compressive Modulus | 125,500 psi | 134,400 psi |
| Flexural Strength | 7,660 psi | 10,850 psi |
| Flexural Modulus | 1,403,000 psi | 775,000 psi |
| Shrinkage | 0.0006 in. / in. | 0.007 in. / in. |
| Heat Deflection Temp | 135 °F | 187 °F |
| Thermal Conductivity | 0.675 W/M*K | — |
Product Description
EpoxAcast™ 655 + 103 Hardener
EpoxAcast™ 655 (formerly Metalset™ A-30) is a versatile aluminum filled castable epoxy resin that is very hard and strong. It is dimensionally stable, even when mass cast up to 512 in³ / 8,390 cm³.
EpoxAcast™ 650 + HT Hardener
EpoxAcast™ 650 is a mineral filled general purpose casting epoxy that is low cost and versatile. It features a low mixed viscosity for minimal bubble entrapment.EpoxAcast™ 650 is used for making hard dies for metal stamping as well as patterns and fixtures. It is 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 makes it ideal for making stamping dies for production pressing of metal ornaments.