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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 35,000 cps | 4,400 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Cure Time | 4 hours | 16 hours |
| Shore D Hardness | — | 88 |
| Shore A Hardness | 37 | — |
| Specific Volume | 25.6 cu. in./lb. | 17.6 cu. in./lb. |
| Color | Water Clear Translucent | Metal Gray |
| Tensile Strength | 600 psi | 3,250 psi |
| Elongation @ Break | 400 % | 1 % |
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
| SORTA-Clear™ 37 | TASK™ 18 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 35,000 cps | 4,400 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 1A:1B | 26A:100B |
| Pot Life | 25 minutes | 20 minutes |
| Cure Time | 4 hours | 16 hours |
| Shore D Hardness | — | 88 |
| Shore A Hardness | 37 | — |
| Specific Gravity | 1.08 g/cc | 1.57 g/cc |
| Specific Volume | 25.6 cu. in./lb. | 17.6 cu. in./lb. |
| Color | Water Clear Translucent | Metal Gray |
| Die B Tear Strength | 105 pli | — |
| Tensile Strength | 600 psi | 3,250 psi |
| Tensile Modulus | — | 514,000 psi |
| Elongation @ Break | 400 % | 1 % |
| 100% Modulus | 90 psi | — |
| Compressive Strength | — | 8,420 psi |
| Compressive Modulus | — | 97,300 psi |
| Flexural Strength | — | 10,700 psi |
| Flexural Modulus | — | 86,000 psi |
| Shrinkage | <.001 in. / in. | 0.0006 in. / in. |
| Heat Deflection Temp | — | 149 °F |
Product Description
SORTA-Clear™ 37
SORTA-Clear™ Series rubbers are premium water clear translucent silicone rubbers (platinum catalyst) which cure at room temperature with negligible shrinkage. SORTA-Clear™ 37 has Shore 37A hardness and features high tensile and tear strength. This product also offers the convenience of a 1A:1B by volume mix ratio.
SORTA-Clear™ silicones are ideal for making prototype, jewelry or other molds of any configuration where model visibility is important (i.e. extracting a model from the mold via cutting). Materials such as urethane, epoxy or polyester resins can then be cast into SORTA-Clear™ silicone without application of a release agent. Other materials such as wax and low melt metal alloys can also be cast into SORTA-Clear™. SORTA-Clear™ can be pigmented with SILC Pig™ silicone pigments.
SORTA Clear™ 37 silicone rubber is FOOD SAFE and can be used for culinary applications including casting chocolate and other confections.
Certified Skin Safe - Cured SORTA Clear™ 37 is skin safe and certified by an independent laboratory.
› Click here for more SORTA-Clear™ silicone products.
TASK™ 18
TASK™ 18 is a relatively low viscosity aluminum filled urethane casting resin that was developed specifically for making short run vacuum forming or thermoforming molds.
When Parts A and B are mixed in proper proportion, TASK™ 18 cures overnight at room temperature with negligible shrinkage to a very hard plastic that has a very high compressive and flexural strength. Cured TASK™ 18 can be polished, machined, drilled, painted, etc. TASK™ 18 is also used to make industrial production parts, prototype parts and tracing patterns.