C
mpare
T
l
Key Differences
| Product Type |
|
|
| Mixed Viscosity | Dough | 11,000 cps |
| Pot Life | 150 minutes | 3 minutes |
| Cure Time | 16 hours | 12 minutes |
| Shore D Hardness | 55 | — |
| Shore A Hardness | — | 19 |
| Specific Volume | 54.31 cu. in./lb. | 25.6 cu. in./lb. |
| Color | Grey | Translucent |
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
| Free Form™ AIR HT | Mold Star™ 19T | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | Dough | 11,000 cps |
| Mix Ratio By Volume | 2A:1B | 1A:1B |
| Mix Ratio By Weight | 2A:1B | 1A:1B |
| Pot Life | 150 minutes | 3 minutes |
| Cure Time | 16 hours | 12 minutes |
| Shore D Hardness | 55 | — |
| Shore A Hardness | — | 19 |
| Specific Gravity | 0.51 g/cc | 1.08 g/cc |
| Specific Volume | 54.31 cu. in./lb. | 25.6 cu. in./lb. |
| Color | Grey | Translucent |
| Die B Tear Strength | — | 90 pli |
| Tensile Strength | — | 420 psi |
| Elongation @ Break | — | 470 % |
| Shrinkage | — | 0.001 in. / in. |
| Heat Deflection Temp | 300 °F | — |
| Useful Temperature (min) | — | -65 °F |
| Useful Temperature (max) | — | 450 °F |
| Heat Deflection With Post Cure | 400 °F | — |
Product Description
Free Form™ AIR HT
Free Form™ AIR HT is a low density, lightweight epoxy putty that offers high temperature resistance to 300°F/149°C when cured at room temperature and 400°F/204°C when heat post cured. This is a low-odor, low shrinkage formula that is easy to use. Free Form™ AIR HT is mixed by hand with a 2A:1B by volume or weight mix ratio. It offers a long working time and cures overnight at room temperature to a hard, rigid epoxy that is very strong with modeling board-like properties. It can be sanded, shaped, drilled, tapped and CNC machined/routered.
Mold Star™ 19T
Mold Star™ 19T is an easy to use Shore 19A translucent platinum silicone that is mixed 1A:1B by volume (no weighing scale necessary). It features a relatively low viscosity and vacuum degassing is not required for most applications. Pot life is 3 minutes and cure time is 12 minutes at room temperature.