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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 280 cps | 120 cps |
| Mix Ratio By Volume | N/A (gram scale required) | 1A:1B |
| Pot Life | 5 hours | 2.5 minutes |
| Cure Time | 24 hours | 15 minutes |
| Shore D Hardness | 80 | 65 |
| Color | Clear | White |
| Tensile Strength | 6,630 psi | 2,400 psi |
| Shrinkage | 0.002 in. / in. | 0.01 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
| EpoxAcast™ 690 | Smooth-Cast™ 65D | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 280 cps | 120 cps |
| Mix Ratio By Volume | — | 1A:1B |
| Mix Ratio By Weight | 100A:30B | 100A:93B |
| Pot Life | 5 hours | 2.5 minutes |
| Cure Time | 24 hours | 15 minutes |
| Shore D Hardness | 80 | 65 |
| Specific Gravity | 1.10 g/cc | 1.05 g/cc |
| Specific Volume | 25 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Clear | White |
| Tensile Strength | 6,630 psi | 2,400 psi |
| Tensile Modulus | 572,000 psi | — |
| Tensile Elongation | 1.8 % | — |
| Elongation @ Break | — | 20 % |
| Compressive Strength | 9,610 psi | — |
| Compressive Modulus | 91,300 psi | — |
| Flexural Strength | 10,980 psi | — |
| Flexural Modulus | 410,000 psi | — |
| Shrinkage | 0.002 in. / in. | 0.01 in. / in. |
| Heat Deflection Temp | 115 °F | — |
| Index of Refraction at 20°C | 1.565 | — |
Product Description
EpoxAcast™ 690
EpoxAcast™ 690 is an UV resistant clear casting epoxy resins suitable for a variety of industrial and art related projects requiring a rigid, clear finished casting. EpoxAcast™ 690 features a very low viscosity for easy mixing and minimal bubble entrapment. Castings cure with negligible shrinkage and are very hard and strong. Resin can be colored with UVO™ or IGNITE™ colorants. Cast Magic™ and Glow Worm™ powders can also be added to create amazing casting effects.
Smooth-Cast™ 65D
The Smooth-Cast™ Semi-Rigid line of low-cost semi-rigid urethane casting resins cure quickly to semi-rigid plastics that offer excellent impact resistance. 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™ color pigments.
These semi-rigid plastics are good for making impact resistant prototypes, models, toys, props, climbing holds, etc.
NOTE: Smooth-Cast™ 57D and Smooth-Cast™ 65D are also suitable for rotational casting applications. Do not use other Smooth-Cast™ semi-rigid plastics for roto casting.