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Key Differences
| Mixed Viscosity | 300 cps | 150 cps |
| Pot Life | 3 minutes | 20 minutes |
| Cure Time | 30 minutes | 90 minutes |
| Shore D Hardness | 57 | 80 |
| Color | Translucent White | White |
| Tensile Strength | 2,420 psi | 6,650 psi |
| Elongation @ Break | 100 % | 6 % |
| Shrinkage | 0.012 in. / in. | 0.0025 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
| Smooth-Cast™ 57D | TASK™ 3 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 300 cps | 150 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:93B | 115A:100B |
| Pot Life | 3 minutes | 20 minutes |
| Cure Time | 30 minutes | 90 minutes |
| Shore D Hardness | 57 | 80 |
| Specific Gravity | 1.05 g/cc | 1.12 g/cc |
| Specific Volume | 26.4 cu. in./lb. | 24.7 cu. in./lb. |
| Color | Translucent White | White |
| Tensile Strength | 2,420 psi | 6,650 psi |
| Tensile Modulus | — | 290,000 psi |
| Elongation @ Break | 100 % | 6 % |
| Compressive Strength | — | 8,300 psi |
| Compressive Modulus | — | 78,000 psi |
| Flexural Strength | — | 9,500 psi |
| Flexural Modulus | — | 288,000 psi |
| Shrinkage | 0.012 in. / in. | 0.0025 in. / in. |
| Heat Deflection Temp | — | 134 °F |
Product Description
Smooth-Cast™ 57D
Smooth-Cast™ 57D is a semi-rigid urethane plastic that offers a gradual cure profile (does not snap cure), making it suitable for machine or hand rotational casting.
Use For Rotational Casting - Once poured into a suitable rubber mold configuration, the mold can be rotated so that the resin mixture gradually coats the inside of the mold cavity. After an adequate wall thickness is attained inside the mold, the result is a cured hollow casting that is semi-rigid and highly impact resistant.
Use as a Casting Resin – Smooth-Cast™ 57D can also be used as a casting resin for making solid, semi-rigid castings that are tough and durable.
Mix ratio is 1A:1B by volume. Working time is 3 minutes, demold time is 30 minutes and full cure properties are attained after 24 hours. Color is white translucent and the material is very easy to color with SO-Strong™, UVO™ or Ignite™ colorants. Cured resin is also easy to paint with acrylic paints or UreCoat™ flexible coating for applications requiring thick, durable finishes.
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TASK™ 3
TASK™ 3 low viscosity, high performance casting resin offers superior physical and performance properties compared to our popular Smooth-Cast™ Series of general purpose casting resins. Vacuum degassing is not necessary and it offers the convenience of a 1A:1B by volume (115A:100B by weight) mix ratio.
TASK™ 3 is white. It has high tensile and flexural strength, as well as high flexural modulus. This plastic was formulated for a variety of industrial applications including pattern making and making prototype models. This resin is designed for casting in thicknesses up to ½” (1.27 cm). TASK™ Plastics are moderately priced and are available in trial kits, one-gallon, five-gallon, 55-gallon drum and totes.