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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 280 cps | 150 cps |
| Mix Ratio By Volume | N/A (gram scale required) | 1A:1B |
| Pot Life | 5 hours | 120 minutes |
| Cure Time | 24 hours | 16 hours |
| Shore D Hardness | 80 | — |
| Shore A Hardness | — | 33 |
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 | Rubber Glass™ | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 280 cps | 150 cps |
| Mix Ratio By Volume | — | 1A:1B |
| Mix Ratio By Weight | 100A:30B | 1A:1B |
| Pot Life | 5 hours | 120 minutes |
| Cure Time | 24 hours | 16 hours |
| Shore D Hardness | 80 | — |
| Shore A Hardness | — | 33 |
| Specific Gravity | 1.10 g/cc | 0.97 g/cc |
| Specific Volume | 25 cu. in./lb. | 28.6 cu. in./lb. |
| Color | Clear | Clear |
| Tensile Strength | 6,630 psi | — |
| Tensile Modulus | 572,000 psi | — |
| Tensile Elongation | 1.8 % | — |
| 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. | <.001 in. / in. |
| Heat Deflection Temp | 115 °F | — |
| Dielectric Constant, 100Hz | — | 3.17 |
| Dielectric Strength | — | 319 volts/mil |
| 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.
Rubber Glass™
Rubber Glass™ is a platinum-catalyzed silicone rubber product developed specifically for special effects and display applications. Two liquids (1 Part A + 1 Part B) are mixed together and poured into a container.
The mixture cures overnight to a solid water clear rubber that can then be easily broken or “crumbled” into pieces that look exactly like broken glass, ice or diamonds. Vibrant colors are possible by adding Silc-Pig™ liquid color pigments.
Rubber Glass™ can be used to create a variety of special effects (i.e. simulated broken glass where human contact is required) and model effects (i.e. simulated ice or water). It can also be used for electronic encapsulation applications.