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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 410 cps | 35,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 8.5 minutes | 30 minutes |
| Cure Time | 2 hours | 24 hours |
| Shore D Hardness | 58 | — |
| Shore A Hardness | — | 40 |
| Specific Volume | 41.3 cu. in./lb. | 23.4 cu. in./lb. |
| Color | Beige | Pink |
| Elongation @ Break | 1.6 % | 300 % |
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
| Feather Lite™ | Smooth‑Sil™ 940 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 410 cps | 35,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | — | 100A:10B |
| Pot Life | 8.5 minutes | 30 minutes |
| Cure Time | 2 hours | 24 hours |
| Shore D Hardness | 58 | — |
| Shore A Hardness | — | 40 |
| Specific Gravity | 0.67 g/cc | 1.18 g/cc |
| Specific Volume | 41.3 cu. in./lb. | 23.4 cu. in./lb. |
| Color | Beige | Pink |
| Die B Tear Strength | — | 100 pli |
| Tensile Strength | — | 600 psi |
| Tensile Modulus | 156,000 psi | — |
| Ultimate Tensile | 2,160 psi | — |
| Elongation @ Break | 1.6 % | 300 % |
| 100% Modulus | — | 200 psi |
| Compressive Strength | 3,070 psi | — |
| Compressive Modulus | 53,700 psi | — |
| Flexural Strength | 3,440 psi | — |
| Flexural Modulus | 164,300 psi | — |
| Shrinkage | 0.003 in. / in. | <.001 in. / in. |
| Heat Deflection Temp | 140 °F | — |
| Useful Temperature (min) | — | -65 °F |
| Useful Temperature (max) | — | 450 °F |
Product Description
Feather Lite™
Feather Lite™ is a heavily filled low-density urethane casting resin. Cured plastic is lightweight (it floats in water!) and has a much lower density than other casting resins.
Feather Lite™ features a convenient 1A:1B by volume mix ratio and mixes easily (pre-mixing of parts A & B is necessary). Cured plastic is strong and can be carved, machined, drilled, sanded, etc. Feather Lite™ can be pigmented with SO-Strong™ color tints prior to casting and finished castings can be painted. And because this product is low-density, it yields more plastic per pound/kg. than other casting resins, the cost per casting is low. Feather Lite™ can be used for a variety of art or industrial design related applications including reproducing sculpture, making fishing lures, prototype model making, casting doll heads and figures, etc.
Smooth‑Sil™ 940
Smooth-On Smooth-Sil™ Platinum Silicones cure at room temperature with negligible shrinkage. With different hardnesses to choose from, Smooth-Sil™ products offer tremendous versatility and are suitable for making production molds of any configuration, large or small. These silicones exhibit good chemical, abrasion and heat resistance. Materials such as plasters, concrete, wax, low-melt metal alloys or resins (urethane, epoxy or polyester) can then be cast into these silicone rubbers without a release agent.
Smooth-Sil™ Platinum Silicones are used for rapid prototyping, wax casting (foundries and candle makers), architectural restoration and for casting concrete. Smooth-Sil™ 940 is suitable for food related applications.