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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 100 cps |
| Pot Life | 30 minutes | 9 minutes |
| Cure Time | 6 hours | 60 minutes |
| Shore D Hardness | — | 72 |
| Shore A Hardness | 30 | — |
| Specific Volume | 20.6 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Lavender | Clear Amber |
| Tensile Strength | 240 psi | 3,170 psi |
| Elongation @ Break | 250 % | 10 % |
| Shrinkage | 0.0025 in. / in. | 0.0075 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™ 326 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | 100 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:130B | 115A:100B |
| Pot Life | 30 minutes | 9 minutes |
| Cure Time | 6 hours | 60 minutes |
| Shore D Hardness | — | 72 |
| Shore A Hardness | 30 | — |
| Specific Gravity | 1.34 g/cc | 1.07 g/cc |
| Specific Volume | 20.6 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Lavender | Clear Amber |
| Die B Tear Strength | 40 pli | — |
| Tensile Strength | 240 psi | 3,170 psi |
| Tensile Modulus | — | 140,000 psi |
| Elongation @ Break | 250 % | 10 % |
| 100% Modulus | 100 psi | — |
| Compressive Strength | — | 3,080 psi |
| Compressive Modulus | — | 32,200 psi |
| Flexural Strength | — | 3,100 psi |
| Flexural Modulus | — | 95,700 psi |
| Shrinkage | 0.0025 in. / in. | 0.0075 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™ 326
The Smooth-Cast™ 325, 326 & 327 ColorMatch™ Series plastics are fast-cast resins that were developed specifically for adding color pigments and fillers to achieve true color representation or filler effect. The ColorMatch™ Series is formulated “color neutral”. Small amounts of pigment will yield accurate, vivid colors from cured castings using So-Strong™ tints or Ignite™ color pigments. The ColorMatch™ Series offers the convenience of a 1A: 1B mix ratio by volume and has a very low viscosity. Demold times range from about 10 minutes to 2-4 hours (depending on product, mass and mold configuration). Note: Large mass castings will get very hot and shrink more, depending on mold configuration.
The ColorMatch™ Series also readily accept fillers (such as URE-FIL™ 3 from Smooth-On). Applications for the ColorMatch™ Series plastics include making pigmented prototype models or figures, special effect props, reproducing small to medium size sculptures, decorative jewelry, etc.