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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 2,000 cps | 100 cps |
| Pot Life | 25 minutes | 9 minutes |
| Cure Time | 48 hours | 60 minutes |
| Shore D Hardness | — | 72 |
| Shore A Hardness | 80 | — |
| Color | Light Amber | Clear Amber |
| Tensile Strength | 900 psi | 3,170 psi |
| Elongation @ Break | 750 % | 10 % |
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
| PMC™-780 WET | Smooth-Cast™ 326 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 2,000 cps | 100 cps |
| Mix Ratio By Volume | 2A:1B | 1A:1B |
| Mix Ratio By Weight | 2A:1B | 115A:100B |
| Pot Life | 25 minutes | 9 minutes |
| Cure Time | 48 hours | 60 minutes |
| Shore D Hardness | — | 72 |
| Shore A Hardness | 80 | — |
| Specific Gravity | 1.02 g/cc | 1.07 g/cc |
| Specific Volume | 27.2 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Light Amber | Clear Amber |
| Die C Tear Strength | 200 pli | — |
| Tensile Strength | 900 psi | 3,170 psi |
| Tensile Modulus | — | 140,000 psi |
| Elongation @ Break | 750 % | 10 % |
| 100% Modulus | 400 psi | — |
| Compressive Strength | — | 3,080 psi |
| Compressive Modulus | — | 32,200 psi |
| Flexural Strength | — | 3,100 psi |
| Flexural Modulus | — | 95,700 psi |
| Shrinkage | <.001 in. / in. | 0.0075 in. / in. |
| Heat Deflection Temp | — | 120 °F |
Product Description
PMC™-780 WET
PMC™-780 is a premium performance urethane rubber that offers exceptional strength, durability and abrasion resistance. PMC™-780 DOES NOT CONTAIN MOCA – a known cancer causing agent and hazard. Mixed two parts A to one part B by weight or volume, PMC™-780 urethane pours easily and cures at room temperature with negligible shrinkage to a solid Shore 80A rubber.
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.