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Key Differences
| Product Type |
|
|
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 3 minutes | 25 minutes |
| Cure Time | 30 minutes | 16 hours |
| Shore D Hardness | 57 | — |
| Shore A Hardness | — | 50 |
| Color | Translucent White | Clear |
| Tensile Strength | 2,420 psi | 250 psi |
| Elongation @ Break | 100 % | 500 % |
| Shrinkage | 0.012 in. / in. | 0.0015 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 | Clear Flex™ 50 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 300 cps | 250 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 100A:93B | 1A:2B |
| Pot Life | 3 minutes | 25 minutes |
| Cure Time | 30 minutes | 16 hours |
| Shore D Hardness | 57 | — |
| Shore A Hardness | — | 50 |
| Specific Gravity | 1.05 g/cc | 1.04 g/cc |
| Specific Volume | 26.4 cu. in./lb. | 26.8 cu. in./lb. |
| Color | Translucent White | Clear |
| Die C Tear Strength | — | 25 pli |
| Tensile Strength | 2,420 psi | 250 psi |
| Elongation @ Break | 100 % | 500 % |
| Shrinkage | 0.012 in. / in. | 0.0015 in. / in. |
| Index of Refraction at 20°C | — | 1.48822 |
| Index of Refraction at 25°C | — | 1.48649 |
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.
› Click here for more Smooth-Cast™ resin products.
Clear Flex™ 50
Clear Flex™ 50 is a water white clear urethane liquid rubber compounds designed for applications that require absolute clarity and resistance to sunlight. Low viscosity ensures easy mixing and pouring. Clear Flex™ 50 will cure at room temperature with negligible shrinkage.
CAUTION: NOT FOR HOME USE. THIS PRODUCT IS FOR INDUSTRIAL USE ONLY. With adequate local exhaust ventilation, respiratory protection is not normally required when using this product. Where risk assessment shows air-purifying respirators are appropriate, follow OSHA respirator regulations and European Standards EN 141, 143 and 371. Protective clothing (gloves and long sleeves) is required to minimize the risk of dermal sensitization. If breathing is affected or a dermal rash develops, immediately cease using this product and seek medical attention. Read SDS before using.