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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 280 cps | 11,000 cps |
| Mix Ratio By Volume | N/A (gram scale required) | 1A:1B |
| Pot Life | 5 hours | 3 minutes |
| Cure Time | 24 hours | 20 minutes |
| Shore D Hardness | 80 | — |
| Shore A Hardness | — | 20 |
| Color | Clear | Translucent Green |
| Tensile Strength | 6,630 psi | 495 psi |
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 | EZ-Spray™ Silicone 20 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 280 cps | 11,000 cps |
| Mix Ratio By Volume | — | 1A:1B |
| Mix Ratio By Weight | 100A:30B | — |
| Pot Life | 5 hours | 3 minutes |
| Cure Time | 24 hours | 20 minutes |
| Shore D Hardness | 80 | — |
| Shore A Hardness | — | 20 |
| Specific Gravity | 1.10 g/cc | 1.08 g/cc |
| Specific Volume | 25 cu. in./lb. | 25.6 cu. in./lb. |
| Color | Clear | Translucent Green |
| Die B Tear Strength | — | 100 pli |
| Tensile Strength | 6,630 psi | 495 psi |
| Tensile Modulus | 572,000 psi | — |
| Tensile Elongation | 1.8 % | — |
| Elongation @ Break | — | 470 % |
| 100% Modulus | — | 47 psi |
| 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 | — |
| Useful Temperature (min) | — | -65 °F |
| Useful Temperature (max) | — | 500 °F |
| Refractive Index | 1.565 nm | — |
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.
EZ-Spray™ Silicone 20
EZ~Spray™ Silicone 20 is a sprayable silicone which cures quickly to soft rubbers with high elongation and tear strength. Liquid silicone is sprayed through the EZ~Spray™ Junior Cartridge System which is an economical alternative to expensive spray equipment. After a suitable thickness is attained, EZ~Spray™ Silicone 20 cures in about 20 minutes. EZ~Spray™ Silicone cures with negligible shrinkage to strong, durable silicone rubbers good for production casting of polyester, epoxy or urethane resins, gypsum, concrete and other materials.