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Key Differences
| Mixed Viscosity | 3,400 cps | 1,200 cps |
| Shore A Hardness | 44 | 60 |
| Color | Beige | Ranges From Amber To Blue |
| Tensile Strength | 300 psi | 700 psi |
| Elongation @ Break | 400 % | 650 % |
| 100% Modulus | 90 psi | 220 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™-744 | PMC™-746 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 3,400 cps | 1,200 cps |
| Mix Ratio By Volume | 2A:1B | 2A:1B |
| Mix Ratio By Weight | 2A:1B | 2A:1B |
| Pot Life | 15 minutes | 15 minutes |
| Cure Time | 16 hours | 16 hours |
| Shore A Hardness | 44 | 60 |
| Specific Gravity | 1.01 g/cc | 1.03 g/cc |
| Specific Volume | 27.5 cu. in./lb. | 26.9 cu. in./lb. |
| Color | Beige | Ranges From Amber To Blue |
| Die C Tear Strength | 90 pli | 100 pli |
| Tensile Strength | 300 psi | 700 psi |
| Elongation @ Break | 400 % | 650 % |
| 100% Modulus | 90 psi | 220 psi |
| Shrinkage | < .001 in. / in. | < .001 in. / in. |
Product Description
PMC™-744
PMC™-744 has been used for years by mold making professionals to cast plaster, concrete, resins, etc. It is excellent for making molds that are strong, durable and dimensionally stable. Low viscosity ensures fine detail reproduction.
PMC™-746
PMC™-746 was developed to make molds for casting gypsum plasters. This product is well suited for use as a rubber case mold – especially large case molds where extra rigidity is required. Shore hardness is 60A. Because of its durability and moisture resistant properties PMC™-746 is also used by zoos and museums for a variety of mold-making, display and exhibit applications. It features a convenient mix ratio (2:1 by weight or volume), and contains no mercury.
Other applications include making plaster block molds, reproducing ornamental plaster (architectural restoration), pre-cast concrete molds, casting waxes, Smooth-On rigid polyurethanes and epoxies and also for making a variety of special effects for movies and theatre.
FOR COMMERCIAL/INDUSTRIAL USE ONLY