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Key Differences
| Mixed Viscosity | 100 cps | 300 cps |
| Pot Life | 9 minutes | 3 minutes |
| Cure Time | 60 minutes | 30 minutes |
| Shore D Hardness | 72 | 57 |
| Color | Clear Amber | Translucent White |
| Tensile Strength | 3,170 psi | 2,420 psi |
| Elongation @ Break | 10 % | 100 % |
| Shrinkage | 0.0075 in. / in. | 0.012 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™ 326 | Smooth-Cast™ 57D | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 100 cps | 300 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 115A:100B | 100A:93B |
| Pot Life | 9 minutes | 3 minutes |
| Cure Time | 60 minutes | 30 minutes |
| Shore D Hardness | 72 | 57 |
| Specific Gravity | 1.07 g/cc | 1.05 g/cc |
| Specific Volume | 25.9 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Clear Amber | Translucent White |
| Tensile Strength | 3,170 psi | 2,420 psi |
| Tensile Modulus | 140,000 psi | — |
| Elongation @ Break | 10 % | 100 % |
| Compressive Strength | 3,080 psi | — |
| Compressive Modulus | 32,200 psi | — |
| Flexural Strength | 3,100 psi | — |
| Flexural Modulus | 95,700 psi | — |
| Shrinkage | 0.0075 in. / in. | 0.012 in. / in. |
| Heat Deflection Temp | 120 °F | — |
Product Description
Smooth-Cast™ 326
The Smooth-Cast™ 325, 326 & 327 ColorMatch™ Series plastics are fast-cast resins that were developed specifically for adding color pigments and fillers to achieve true color representation or filler effect. The ColorMatch™ Series is formulated “color neutral”. Small amounts of pigment will yield accurate, vivid colors from cured castings using So-Strong™ tints or Ignite™ color pigments. The ColorMatch™ Series offers the convenience of a 1A: 1B mix ratio by volume and has a very low viscosity. Demold times range from about 10 minutes to 2-4 hours (depending on product, mass and mold configuration). Note: Large mass castings will get very hot and shrink more, depending on mold configuration.
The ColorMatch™ Series also readily accept fillers (such as URE-FIL™ 3 from Smooth-On). Applications for the ColorMatch™ Series plastics include making pigmented prototype models or figures, special effect props, reproducing small to medium size sculptures, decorative jewelry, etc.
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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.