C
mpare
T
l
Key Differences
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 2,000 cps |
| Cure Time | 6 hours | 48 hours |
| Shore A Hardness | 30 | 80 |
| Specific Volume | 20.6 cu. in./lb. | 27.2 cu. in./lb. |
| Color | Lavender | Light Amber |
| Tensile Strength | 240 psi | 900 psi |
| Elongation @ Break | 250 % | 750 % |
| 100% Modulus | 100 psi | 400 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™-780 DRY | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 2,000 cps |
| Mix Ratio By Volume | 1A:1B | 2A:1B |
| Mix Ratio By Weight | 100A:130B | 2A:1B |
| Pot Life | 30 minutes | 25 minutes |
| Cure Time | 6 hours | 48 hours |
| Shore A Hardness | 30 | 80 |
| Specific Gravity | 1.34 g/cc | 1.02 g/cc |
| Specific Volume | 20.6 cu. in./lb. | 27.2 cu. in./lb. |
| Color | Lavender | Light Amber |
| Die B Tear Strength | 40 pli | — |
| Die C Tear Strength | — | 200 pli |
| Tensile Strength | 240 psi | 900 psi |
| Elongation @ Break | 250 % | 750 % |
| 100% Modulus | 100 psi | 400 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™-780 DRY
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.
Pick The One Best Suited For Your Application: Original PMC™-780 Dry does not exude oil. New PMC™-780 Wet contains a built in release agent to aid in demolding concrete. (Note: “wet” rubber has a higher net shrinkage value over time vs. “dry “ rubber.)