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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 2,000 cps | 6,000 cps |
| Mix Ratio By Volume | 2A:1B | N/A (gram scale required) |
| Pot Life | 25 minutes | 50 minutes |
| Cure Time | 48 hours | 16 hours |
| Shore A Hardness | 80 | 20 |
| Specific Volume | 27.2 cu. in./lb. | 20.5 cu. in./lb. |
| Color | Light Amber | Black |
| Tensile Strength | 900 psi | 157 psi |
| 100% Modulus | 400 psi | 29 psi |
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 | FMC™ 200 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 2,000 cps | 6,000 cps |
| Mix Ratio By Volume | 2A:1B | — |
| Mix Ratio By Weight | 2A:1B | 100A:12B |
| Pot Life | 25 minutes | 50 minutes |
| Cure Time | 48 hours | 16 hours |
| Shore A Hardness | 80 | 20 |
| Specific Gravity | 1.02 g/cc | 1.35 g/cc |
| Specific Volume | 27.2 cu. in./lb. | 20.5 cu. in./lb. |
| Color | Light Amber | Black |
| Die C Tear Strength | 200 pli | — |
| Tensile Strength | 900 psi | 157 psi |
| Elongation @ Break | 750 % | 700 % |
| 100% Modulus | 400 psi | 29 psi |
| Shrinkage | <.001 in. / in. | negligible in. / in. |
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.
FMC™ 200
FMC™-200 is a polysulfide rubber mold compound with high tear strength that cures overnight with negligible shrinkage. Molds made of FMC™-200 are very durable and will perform in production. The mix ratio is 100 parts of Part A to 12 parts of Part B by weight. FMC™-200 cures to a Shore hardness of 20 A.
FMC™-200 is ideal for those applications that require capturing intricate detail from a variety of model surfaces. Unlike polyurethanes, FMC™-200 is not sensitive to moisture and can be poured directly over wet plaster or water/sulfur based clays. Common applications include molds for foundry and pattern work, sculpture (lost wax process), casting various gypsum products and waxes.