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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | Light Paste |
| Pot Life | 15 minutes | 35 minutes |
| Cure Time | 75 minutes | 16 hours |
| Barcol 935 Hardness | — | 72 |
| Shore A Hardness | 25 | — |
| Color | Light Blue | White |
| Tensile Strength | 240 psi | 4,300 psi |
| Elongation @ Break | 250 % | 0.8 % |
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™ 25 | MT-13™ | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 4,250 cps | Light Paste |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:130B | 100A:123B |
| Pot Life | 15 minutes | 35 minutes |
| Cure Time | 75 minutes | 16 hours |
| Barcol 935 Hardness | — | 72 |
| Shore A Hardness | 25 | — |
| Specific Gravity | 1.34 g/cc | 1.37 g/cc |
| Specific Volume | 20.6 cu. in./lb. | — |
| Color | Light Blue | White |
| Die B Tear Strength | 40 pli | — |
| Tensile Strength | 240 psi | 4,300 psi |
| Tensile Modulus | — | 285,000 psi |
| Elongation @ Break | 250 % | 0.8 % |
| 100% Modulus | 100 psi | — |
| Compressive Strength | — | 8,700 psi |
| Compressive Modulus | — | 165,000 psi |
| Shrinkage | 0.0025 in. / in. | — |
| Useful Temperature (min) | -65 °F | — |
| Useful Temperature (max) | 400 °F | — |
| Sag Resistance | — | 1/16 in. |
Product Description
OOMOO™ 25
No Vacuuming – No Scale – Easy To Use . . . OOMOO™ 25 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 a low viscosity for easy mixing and pouring . . . vacuum degassing is not necessary. This product cures at room temperature with negligible shrinkage. OOMOO™ 25 has a 15-minute pot life and 75-minute 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™ 25 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.
MT-13™
Smooth-On MT-13™ is a premium performance epoxy for applications requiring maximum holding power and water resistance. MT-13™ is a two component epoxy adhesive cement which is mixed in equal parts by volume (100A/123B by weight) Pot Life is 35 minutes and handling strength develops in 16 hours at 73° F / 23° C. MT-13™ adheres extremely well to both porous and non-porous surfaces. MT-13™ is widely used by the boating industry for assembly and general repair. MT-13™ also maintains holding power under extreme cold conditions.