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Key Differences
| Mixed Viscosity | 430 cps | 300 cps |
| Pot Life | 7 minutes | 3 minutes |
| Cure Time | 60 minutes | 30 minutes |
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™ 61D | Smooth-Cast™ 57D | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 430 cps | 300 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:93B | 100A:93B |
| Pot Life | 7 minutes | 3 minutes |
| Cure Time | 60 minutes | 30 minutes |
| Shore D Hardness | 61 | 57 |
| Specific Gravity | 1.05 g/cc | 1.05 g/cc |
| Specific Volume | 26.4 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Translucent White | Translucent White |
| Tensile Strength | 2,420 psi | 2,420 psi |
| Elongation @ Break | 100 % | 100 % |
| Shrinkage | 0.012 in. / in. | 0.012 in. / in. |
Product Description
Smooth-Cast™ 61D
The Smooth-Cast™ Semi-Rigid line of low-cost semi-rigid urethane casting resins cure quickly to semi-rigid plastics that offer exceptional strength and impact resistance.
New Formulations – New Look!
Smooth-Cast™ 61D is newly reformulated with a translucent white appearance and improved physical properties. All Smooth-Cast semi rigids are now mercury free and phthalate free. These plastics are easy-to-use (mix ratio is 1A:1B by volume) and have low viscosities for minimal bubble entrapment. Vibrant colors are possible by adding SO-Strong™, UVO™ or Ignite™ colorants.
These semi-rigid plastics are good for making impact resistant prototypes, models, toys, props, climbing holds, etc.
› Click here for more Smooth-Cast™ resin products.
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.