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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 100 cps | 6,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 9 minutes | 90 minutes |
| Cure Time | 60 minutes | 16 hours |
| Shore D Hardness | 72 | — |
| Shore A Hardness | — | 12 |
| Specific Volume | 25.9 cu. in./lb. | 20.1 cu. in./lb. |
| Color | Clear Amber | Black |
| Tensile Strength | 3,170 psi | 60 psi |
| Elongation @ Break | 10 % | 550 % |
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 | FMC™ 205 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 100 cps | 6,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 115A:100B | 100A:12B |
| Pot Life | 9 minutes | 90 minutes |
| Cure Time | 60 minutes | 16 hours |
| Shore D Hardness | 72 | — |
| Shore A Hardness | — | 12 |
| Specific Gravity | 1.07 g/cc | 1.38 g/cc |
| Specific Volume | 25.9 cu. in./lb. | 20.1 cu. in./lb. |
| Color | Clear Amber | Black |
| Tensile Strength | 3,170 psi | 60 psi |
| Tensile Modulus | 140,000 psi | — |
| Elongation @ Break | 10 % | 550 % |
| 100% Modulus | — | 15 psi |
| 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. | Negligible 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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FMC™ 205
FMC™-205 is a polysulfide rubber mold compound that cures overnight with negligible shrinkage to a lasting durable rubber that will perform in production. The mix ratio is 100 parts of Part A to 12 parts of Part B by weight. FMC™-205 cures to a Shore hardness of 12 A.
FMC™-205 is ideal for those applications that require capturing intricate detail from a variety of model surfaces. Unlike polyurethanes, FMC™-205 is not sensitive to moisture and can be poured directly over wet plaster or water/sulfur based clays. Common applications include molds of sculpture (lost wax process), casting various gypsum products and waxes.