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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 1,800 cps | Light Paste |
| Pot Life | 30 minutes | 20 minutes |
| Barcol 935 Hardness | — | 87 |
| Shore D Hardness | — | 85 |
| Shore A Hardness | 30 | — |
| Specific Volume | 26.7 cu. in./lb. | 19.4 cu. in./lb. |
| Color | Clear Amber | White |
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™-121 30/DRY | EpoxAcoat™ WHITE | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 1,800 cps | Light Paste |
| Mix Ratio By Volume | 1A:1B | 5A:1B |
| Mix Ratio By Weight | 1A:1B | 100A:15B |
| Pot Life | 30 minutes | 20 minutes |
| Thin Film Working Time | — | 40 minutes |
| Thin Film Recoat Time | — | 60 minutes |
| Tack Free Time | — | 4 hours |
| Cure Time | 16 hours | 16 hours |
| Barcol 935 Hardness | — | 87 |
| Shore D Hardness | — | 85 |
| Shore A Hardness | 30 | — |
| Specific Gravity | 1.04 g/cc | 1.43 g/cc |
| Specific Volume | 26.7 cu. in./lb. | 19.4 cu. in./lb. |
| Color | Clear Amber | White |
| Die C Tear Strength | 75 pli | — |
| Tensile Strength | 400 psi | — |
| Ultimate Tensile | — | 26,000 psi |
| Elongation @ Break | 1,000 % | — |
| 100% Modulus | 82 psi | — |
| Compressive Strength | — | 24,000 psi |
| Flexural Strength | — | 30,000 psi |
| Shrinkage | < .001 in. / in. | 0.00015 in. / in. |
| Heat Deflection Temp | — | 133 °F |
Product Description
PMC™-121 30/DRY
The PMC™-121 Series urethane rubbers feature convenient one-to-one by volume mix ratios. PMC™-121/30 Dry is exceptionally strong and abrasion resistant for soft urethane mold rubbers. It does not exude oil and can be used for casting waxes, Smooth-On liquid plastics, gypsum plasters and other materials.
EpoxAcoat™ WHITE
EpoxAcoat™ RED, GREY, WHITE and NEUTRAL are thixotropic epoxy gel coats which are widely used for hand laminating and tooling applications. They are tough and strong surface coat resins which cure at room temperature and offer exceptional abrasion resistance. EpoxAcoat™ NEUTRAL is formulated “color neutral” specifically for adding color pigments and fillers. For high temperature applications (to 284°F / 140°C) use EpoxAcoat HT™ (see separate technical bulletin).