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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 1,100 cps | 80 cps |
| Pot Life | 4 minutes | 3 minutes |
| Cure Time | 48 hours | 10 minutes |
| Shore D Hardness | — | 70 |
| Shore A Hardness | 60 | — |
| Tensile Strength | 990 psi | 3,000 psi |
| Elongation @ Break | 400 % | 5 % |
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
| Simpact™ 60A | Smooth-Cast™ 300 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 1,100 cps | 80 cps |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:94B | 100A:90B |
| Pot Life | 4 minutes | 3 minutes |
| Handling Time | 2 hours | — |
| Cure Time | 48 hours | 10 minutes |
| Shore D Hardness | — | 70 |
| Shore A Hardness | 60 | — |
| Specific Gravity | 1.08 g/cc | 1.05 g/cc |
| Specific Volume | 25.7 cu. in./lb. | 26.4 cu. in./lb. |
| Color | White | White |
| Die C Tear Strength | 142 pli | — |
| Tensile Strength | 990 psi | 3,000 psi |
| Tensile Modulus | — | 139,500 psi |
| Elongation @ Break | 400 % | 5 % |
| 100% Modulus | 312 psi | — |
| Compressive Strength | — | 4,000 psi |
| Compressive Modulus | — | 45,800 psi |
| Flexural Strength | — | 4,510 psi |
| Flexural Modulus | — | 128,000 psi |
| Shrinkage | <.007 in. / in. | 0.01 in. / in. |
| Heat Deflection Temp | — | 120 °F |
Product Description
Simpact™ 60A
Simpact™ 60A urethane is a low odor, fast-setting urethane elastomer which offers very high tear strength, impact resistance and wear resistance. Simpact™ urethanes are phthalate free, mercury free and MOCA free. Simpact™ urethanes pour easily. Working time is 4 minutes, handling time is 2 hours and full cure time is 48 hours at room temperature.
Cured rubber has exceptional performance characteristics and dimensional stability. Simpact™ urethanes can be colored with SO-Strong™, UVO™ or Ignite™ colorants. Simpact™ urethanes are suitable for making impact resistant props, prototypes and display pieces.
This material may congeal if exposed to cold temperatures. To reconstitute, Part A & B must be heated to 90°F (33°C) then thoroughly mixed to an even consistency.
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Smooth-Cast™ 300
The Smooth-Cast™ 300 Series of liquid plastics are ultra-low viscosity casting resins that yield castings that are bright white and virtually bubble free. Vacuum degassing is not necessary. They offer the convenience of a 1A:1B by volume or 100A:90B by weight mix ratio. The differences between them are pot life and demold time.
These resins readily accept fillers (such as URE-FIL™ 3 ) and can be colored with SO-Strong™ or Ignite™ color tints (Smooth-Cast™ 325 series accepts pigments better than the Smooth Cast™ 300 series). Fully cured castings are tough, durable, machinable and paintable. They resist moisture and mild solvents. Applications for Smooth-Cast™ 300 Series Liquid Plastics include reproducing small to medium size sculptures, making prototype models, special effect props and decorative jewelry.
Those interested in making roto cast pieces should refer to the Smooth-Cast™ 65D technical bulletin.