C
mpare
T
l
Key Differences
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 80 cps |
| Pot Life | 30 minutes | 7 minutes |
| Cure Time | 6 hours | 30 minutes |
| Shore D Hardness | — | 70 |
| Shore A Hardness | 30 | — |
| Specific Volume | 20.6 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Lavender | White |
| Tensile Strength | 240 psi | 3,000 psi |
| Elongation @ Break | 250 % | 7.5 % |
| Shrinkage | 0.0025 in. / in. | 0.0065 in. / in. |
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 | Smooth-Cast™ 305 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 80 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:130B | 100A:90B |
| Pot Life | 30 minutes | 7 minutes |
| Cure Time | 6 hours | 30 minutes |
| Shore D Hardness | — | 70 |
| Shore A Hardness | 30 | — |
| Specific Gravity | 1.34 g/cc | 1.05 g/cc |
| Specific Volume | 20.6 cu. in./lb. | 26.4 cu. in./lb. |
| Color | Lavender | White |
| Die B Tear Strength | 40 pli | — |
| Tensile Strength | 240 psi | 3,000 psi |
| Tensile Modulus | — | 134,000 psi |
| Elongation @ Break | 250 % | 7.5 % |
| 100% Modulus | 100 psi | — |
| Compressive Strength | — | 3,800 psi |
| Compressive Modulus | — | 44,900 psi |
| Flexural Strength | — | 4,000 psi |
| Flexural Modulus | — | 118,000 psi |
| Shrinkage | 0.0025 in. / in. | 0.0065 in. / in. |
| Heat Deflection Temp | — | 120 °F |
| 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.
Smooth-Cast™ 305
The Smooth-Cast™ 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. They offer the convenience of a 1A:1B by volume or 100A:90B by weight mix ratio. The differences between them are pot life and demold time.
These resins readily accept fillers (such as URE-FIL™ 3 from Smooth-On) and can be colored with SO-Strong™ or Ignite™ color tints (Smooth-Cast™ 325 series accepts pigments better than the Smooth Cast™ 300 series). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast™ 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.