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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 12,500 cps | 30,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 6 minutes | 40 minutes |
| Cure Time | 30 minutes | 24 hours |
| Shore A Hardness | 16 | 30 |
| Color | Blue-Green | Blue |
| Tensile Strength | 400 psi | 550 psi |
| 100% Modulus | 55 psi | 95 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
| Mold Star™ 16 FAST | Mold Max™ XLS™ II | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 12,500 cps | 30,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 1A:1B | 100A:10B |
| Pot Life | 6 minutes | 40 minutes |
| Cure Time | 30 minutes | 24 hours |
| Shore A Hardness | 16 | 30 |
| Specific Gravity | 1.18 g/cc | 1.22 g/cc |
| Specific Volume | 23.5 cu. in./lb. | 22.7 cu. in./lb. |
| Color | Blue-Green | Blue |
| Die B Tear Strength | 88 pli | 110 pli |
| Tensile Strength | 400 psi | 550 psi |
| Elongation @ Break | 440 % | 375 % |
| 100% Modulus | 55 psi | 95 psi |
| Shrinkage | <.001 in. / in. | 0.001 in. / in. |
| Useful Temperature (min) | -65 °F | -65 °F |
| Useful Temperature (max) | 450 °F | 400 °F |
| Dielectric Constant, 100Hz | — | 3.4 |
| Dielectric Strength | — | >360 volts/mil |
| Dissipation Factor, 100Hz | — | 0.002 |
| Thermal Conductivity | — | 0.24 W/M*K |
| Volume Resistivity | — | 9.000000E+15 ohm/cm |
Product Description
Mold Star™ 16 FAST
Mold Star™ rubbers are easy to use platinum silicones which are mixed 1A:1B by volume (no weighing scale necessary). Mold Star™ silicones feature relatively low viscosities and vacuum degassing is not required for most applications. Mold Star™ 16 FAST is a fast material with a 6 minute pot life and 30 minute cure time.
Mold Max™ XLS™ II
Mold Max™ XLS™ II is a Shore 30A tin-catalyzed silicone mold rubber that exhibits very low long-term shrinkage. XLS™ II molds last longer than other silicones in production when casting chemically harsh resins such as epoxies and polyesters as well as urethane foams.
Mix ratio is 100A:10B by weight. Pot life is 40 minutes and cure time is 24 hours at room temperature. Mold Max™ XLS™ II silicone will reproduce the finest detail and is suitable for a variety of industrial and art related applications including making production molds for, reproducing prototypes, furniture, sculpture and architectural elements. Mold Max™ XLS™ II can be thickened with THI‑VEX™ additive for brush-on applications.
Vacuum degassing mixed material using a vacuum pump and chamber to remove entrapped air is recommended.