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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 1,200 cps |
| Pot Life | 30 minutes | 15 minutes |
| Cure Time | 6 hours | 16 hours |
| Shore A Hardness | 30 | 60 |
| Specific Volume | 20.6 cu. in./lb. | 26.9 cu. in./lb. |
| Color | Lavender | Ranges From Amber To Blue |
| Tensile Strength | 240 psi | 700 psi |
| Elongation @ Break | 250 % | 650 % |
| 100% Modulus | 100 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
| OOMOO™ 30 | PMC™-746 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 1,200 cps |
| Mix Ratio By Volume | 1A:1B | 2A:1B |
| Mix Ratio By Weight | 100A:130B | 2A:1B |
| Pot Life | 30 minutes | 15 minutes |
| Cure Time | 6 hours | 16 hours |
| Shore A Hardness | 30 | 60 |
| Specific Gravity | 1.34 g/cc | 1.03 g/cc |
| Specific Volume | 20.6 cu. in./lb. | 26.9 cu. in./lb. |
| Color | Lavender | Ranges From Amber To Blue |
| Die B Tear Strength | 40 pli | — |
| Die C Tear Strength | — | 100 pli |
| Tensile Strength | 240 psi | 700 psi |
| Elongation @ Break | 250 % | 650 % |
| 100% Modulus | 100 psi | 220 psi |
| Shrinkage | 0.0025 in. / in. | < .001 in. / in. |
| Useful Temperature (min) | -65 °F | — |
| Useful Temperature (max) | 400 °F | — |
Product Description
OOMOO™ 30
No Vacuuming – No Scale – Easy To Use . . . OOMOO™ 30 is an easy to use tin cure silicone rubber compound that features a convenient one-to-one by volume mix ratio (no scale necessary). It has low viscosity for easy mixing and pouring . . . vacuum degassing is not necessary. This product cures at room temperature with negligible shrinkage. OOMOO™ 30 has a 30-minute pot life, with a six-hour cure time.
For The Novice Mold Maker - OOMOO™ silicones do not have great tear strength. They are good for making simple one- or two piece block molds. If you require a high-tear strength silicone, Mold Max™ silicones are recommended.
OOMOO™ 30 is suitable for a variety of art-related and industrial applications including making one and two-piece block molds for sculpture and prototype reproduction, casting plaster, resins and wax. OOMOO™ silicones are also suitable for electrical potting and encapsulation applications.
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