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Key Differences
| Mixed Viscosity | 12,000 cps | Light Paste |
| Mix Ratio By Volume | N/A (gram scale required) | 5A:1B |
| Pot Life | 4 hours | 20 minutes |
| Barcol 935 Hardness | — | 87 |
| Color | Grey | Neutral |
| Ultimate Tensile | 6,000 psi | 26,000 psi |
| Compressive Strength | 15,700 psi | 24,000 psi |
| Shrinkage | 0.001 in. / in. | 0.00015 in. / in. |
| Heat Deflection Temp | 225 °F | 133 °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 | EpoxAcoat™ NEUTRAL | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 12,000 cps | Light Paste |
| Mix Ratio By Volume | — | 5A:1B |
| Mix Ratio By Weight | 100A:8B | 100A:15B |
| Pot Life | 4 hours | 20 minutes |
| Thin Film Working Time | — | 40 minutes |
| Thin Film Recoat Time | — | 60 minutes |
| Tack Free Time | — | 4 hours |
| Cure Time | Twenty Four Hours Followed By Post Cures | 16 hours |
| Barcol 935 Hardness | — | 87 |
| Shore D Hardness | 90 | 85 |
| Specific Gravity | 1.64 g/cc | 1.43 g/cc |
| Specific Volume | 16.5 cu. in./lb. | 19.4 cu. in./lb. |
| Color | Grey | Neutral |
| Tensile Modulus | 7,200,000 psi | — |
| Ultimate Tensile | 6,000 psi | 26,000 psi |
| Tensile Elongation | 0.50 % | — |
| Compressive Strength | 15,700 psi | 24,000 psi |
| Compressive Modulus | 270,000 psi | — |
| Flexural Strength | — | 30,000 psi |
| Shrinkage | 0.001 in. / in. | 0.00015 in. / in. |
| Heat Deflection Temp | 225 °F | 133 °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).
EpoxAcoat™ NEUTRAL
EpoxAcoat™ RED, GREY, WHITE and NEUTRAL are thixotropic epoxy gel coats which are widely used for hand laminating and tooling applications. They are tough and strong surface coat resins which cure at room temperature and offer exceptional abrasion resistance. EpoxAcoat™ NEUTRAL is formulated “color neutral” specifically for adding color pigments and fillers. For high temperature applications (to 284°F / 140°C) use EpoxAcoat HT™ (see separate technical bulletin).