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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 12,000 cps | 25,000 cps |
| Pot Life | 4 hours | 60 minutes |
| Shore D Hardness | 90 | — |
| Shore A Hardness | — | 25 |
| Specific Volume | 16.5 cu. in./lb. | 23.5 cu. in./lb. |
| Color | Grey | Purple |
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 | Mold Max™ 25 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 12,000 cps | 25,000 cps |
| Mix Ratio By Weight | 100A:8B | 100A:5B |
| Pot Life | 4 hours | 60 minutes |
| Cure Time | Twenty Four Hours Followed By Post Cures | 24 hours |
| Shore D Hardness | 90 | — |
| Shore A Hardness | — | 25 |
| Specific Gravity | 1.64 g/cc | 1.18 g/cc |
| Specific Volume | 16.5 cu. in./lb. | 23.5 cu. in./lb. |
| Color | Grey | Purple |
| Die B Tear Strength | — | 130 pli |
| Tensile Strength | — | 577 psi |
| Tensile Modulus | 7,200,000 psi | — |
| Ultimate Tensile | 6,000 psi | — |
| Tensile Elongation | 0.50 % | — |
| Elongation @ Break | — | 375 % |
| 100% Modulus | — | 80 psi |
| Compressive Strength | 15,700 psi | — |
| Compressive Modulus | 270,000 psi | — |
| Shrinkage | 0.001 in. / in. | 0.001 in. / in. |
| Heat Deflection Temp | 225 °F | — |
| 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 |
| Thermal Conductivity | 0.675 W/M*K | — |
| Volume Resistance | — | 8.29E+11 ohm |
| Volume Resistivity | — | 5.83E+13 ohm/cm |
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).
Mold Max™ 25
Mold Max™ Silicones are tin-cured silicone 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 Mold Max™ 25 is 60 minutes and cures overnight at room temperature.
Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.