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Key Differences
| Product Type |
|
|
| Pot Life | 25 minutes | 45 minutes |
| Cure Time | 4 hours | 6 hours |
| Specific Volume | 25.6 cu. in./lb. | 19.5 cu. in./lb. |
| Color | Water Clear Translucent | White |
| Die B Tear Strength | 105 pli | 50 pli |
| Tensile Strength | 600 psi | 222 psi |
| 100% Modulus | 90 psi | 71 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
| SORTA-Clear™ 37 | Smooth‑Sil™ 933 Flame Out | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 35,000 cps | 40,000 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 1A:1B | 1A:1B |
| Pot Life | 25 minutes | 45 minutes |
| Cure Time | 4 hours | 6 hours |
| Shore A Hardness | 37 | 33 |
| Specific Gravity | 1.08 g/cc | 1.42 g/cc |
| Specific Volume | 25.6 cu. in./lb. | 19.5 cu. in./lb. |
| Color | Water Clear Translucent | White |
| Die B Tear Strength | 105 pli | 50 pli |
| Tensile Strength | 600 psi | 222 psi |
| Elongation @ Break | 400 % | 433 % |
| 100% Modulus | 90 psi | 71 psi |
| Shrinkage | <.001 in. / in. | <0.001 in. / in. |
| Useful Temperature (min) | — | -65 °F |
| Useful Temperature (max) | — | 450 °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.
Smooth‑Sil™ 933 Flame Out
Smooth-Sil™ 933 Flame Out is designed specifically for flame rated gasket and potting applications.
Smooth-Sil™ 933 Flame Out is a Shore 33A platinum silicone that is mixed 1A:1B by volume or weight. Rubber cures at room temperature (73°F/23°C) with negligible shrinkage. Vacuum degassing is recommended to minimize air bubbles in cured rubber. Cured material is rated to UL 94 V-0
Smooth-Sil™ 933 cures in 6 hours to a soft, strong rubber that is tear resistant and exhibits very low long term shrinkage. An infinite number of color effects can be achieved by adding Silc Pig™ silicone pigments. Applications include electrical potting for flame resistant enclosures, creating gaskets for medical devices and electrical appliances and other applications where a flame resistant, flexible silicone seal is required. Note: This product will not cure against surfaces containing sulfur, even when sealed.