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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 12,000 cps | 3,000 cps |
| Pot Life | 4 hours | 20 minutes |
| Color | Grey | Beige |
| Tensile Modulus | 7,200,000 psi | 400,000 psi |
| Compressive Strength | 15,700 psi | 8,500 psi |
| Compressive Modulus | 270,000 psi | 400,000 psi |
| Shrinkage | 0.001 in. / in. | 0.0006 in. / in. |
| Heat Deflection Temp | 225 °F | 135 °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 + HT Hardener | Smooth-Cast™ 385 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 12,000 cps | 3,000 cps |
| Mix Ratio By Weight | 100A:8B | 1A:5B |
| Pot Life | 4 hours | 20 minutes |
| Cure Time | Twenty Four Hours Followed By Post Cures | 2 hours |
| Shore D Hardness | 90 | 85 |
| Specific Gravity | 1.64 g/cc | 1.60 g/cc |
| Specific Volume | 16.5 cu. in./lb. | 17.3 cu. in./lb. |
| Color | Grey | Beige |
| Tensile Strength | — | 3,100 psi |
| Tensile Modulus | 7,200,000 psi | 400,000 psi |
| Ultimate Tensile | 6,000 psi | — |
| Tensile Elongation | 0.50 % | — |
| Elongation @ Break | — | 1 % |
| Compressive Strength | 15,700 psi | 8,500 psi |
| Compressive Modulus | 270,000 psi | 400,000 psi |
| Flexural Strength | — | 5,900 psi |
| Flexural Modulus | — | 433,000 psi |
| Shrinkage | 0.001 in. / in. | 0.0006 in. / in. |
| Heat Deflection Temp | 225 °F | 135 °F |
| Thermal Conductivity | 0.675 W/M*K | — |
Product Description
EpoxAcast™ 655 + HT 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. Maximum heat resistance is achieved using HT HIGH TEMP hardener (up to 225°F/108°C).
Smooth-Cast™ 385
Smooth-Cast™ 385 is a mineral filled urethane casting resin that is very hard and durable. When Parts A and B are mixed in proper proportion (1A:5B by weight), Smooth-Cast™ 385 cures at room temperature with virtually no shrinkage. This rigid urethane casting resin has high compressive and flexural strength. Fully cured castings are tough, machinable and paintable.
Color effects are possible by adding pigment dispersions. They resist moisture and mild solvents. Smooth-Cast™ 385 is ideal for making industrial production parts, foundry patterns, vacuum forming molds, and some ceramic applications