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Key Differences
| Pot Life | 8.5 minutes | 6 minutes |
| Cure Time | 2 hours | 1 hour |
| Shore D Hardness | 58 | 75 |
| Specific Volume | 41.3 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Beige | White |
| Tensile Modulus | 156,000 psi | 270,000 psi |
| Elongation @ Break | 1.6 % | 7.5 % |
| Compressive Strength | 3,070 psi | 7,100 psi |
| Compressive Modulus | 53,700 psi | 78,500 psi |
| Flexural Strength | 3,440 psi | 7,100 psi |
| Flexural Modulus | 164,300 psi | 250,000 psi |
| Shrinkage | 0.003 in. / in. | 0.0058 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
| Feather Lite™ | TASK™ 21 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 410 cps | 500 cps |
| Mix Ratio By Volume | 1A:1B | 2A:1B |
| Mix Ratio By Weight | — | 2A:1B |
| Pot Life | 8.5 minutes | 6 minutes |
| Cure Time | 2 hours | 1 hour |
| Shore D Hardness | 58 | 75 |
| Specific Gravity | 0.67 g/cc | 1.07 g/cc |
| Specific Volume | 41.3 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Beige | White |
| Tensile Strength | — | 5,500 psi |
| Tensile Modulus | 156,000 psi | 270,000 psi |
| Ultimate Tensile | 2,160 psi | — |
| Elongation @ Break | 1.6 % | 7.5 % |
| Compressive Strength | 3,070 psi | 7,100 psi |
| Compressive Modulus | 53,700 psi | 78,500 psi |
| Flexural Strength | 3,440 psi | 7,100 psi |
| Flexural Modulus | 164,300 psi | 250,000 psi |
| Shrinkage | 0.003 in. / in. | 0.0058 in. / in. |
| Heat Deflection Temp | 140 °F | 144 °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.
TASK™ 21
TASK™ 21 is a performance urethane casting resin that has been described by many as having similar performance and mechanical characteristics to ABS plastic, with high compressive and flexural strength. TASK 21 has no odor and is easy to process. Mix ratio is 2A:1B by weight or volume. Pot life is 6 minutes and handling strength is reached in 60 minutes at room temperature (depending on mass and configuration).
TASK 21 features a low mixed viscosity of 500 cps and readily de-airs itself when cast into molds. SO-Strong™ or IGNITE™ colorants can be added for color and a variety of powder fillers can be added to alter performance or appearance characteristics. Applications for TASK 21 include rapid prototyping, casting strong and highly detailed models, making holding / assembly fixtures, figurines and decorative castings.
IMPORTANT - TASK 21 can not be cast into platinum-cure silicone molds. We recommend casting TASK 21 into tin-cure silicone or urethane rubber molds (using a release agent).