C
mpare
T
l
Add Material to Compare
Key Differences
| Product Type |
|
|
| Mixed Viscosity | 5,000 cps | 800 cps |
| Mix Ratio By Volume | N/A (gram scale required) | 1A:1B |
| Pot Life | 3 hours | 2.5 minutes |
| Barcol 935 Hardness | 93 | — |
| Shore A Hardness | — | 40 |
| Specific Volume | 18.22 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Black | Translucent White |
| Shrinkage | 0.007 in. / in. | 0.002 in. / in. |
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
| EpoxAcast™ 650 BLACK + HT Hardener | KX Flex™ 40 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 5,000 cps | 800 cps |
| Mix Ratio By Volume | — | 1A:1B |
| Mix Ratio By Weight | 100A:10B | 1A:1B |
| Pot Life | 3 hours | 2.5 minutes |
| Handling Time | — | 30 minutes |
| Cure Time | Twenty Four Hours Followed By Post Cures | 24 hours |
| Barcol 935 Hardness | 93 | — |
| Shore A Hardness | — | 40 |
| Specific Gravity | 1.52 g/cc | 1.07 g/cc |
| Specific Volume | 18.22 cu. in./lb. | 25.9 cu. in./lb. |
| Color | Black | Translucent White |
| Tensile Strength | — | 457 psi |
| Tensile Modulus | 1,079,000 psi | — |
| Ultimate Tensile | 6,900 psi | — |
| Tensile Elongation | 0.82 % | — |
| Elongation @ Break | — | 400 % |
| Compressive Strength | 15,980 psi | — |
| Compressive Modulus | 134,000 psi | — |
| Flexural Strength | 10,850 psi | — |
| Flexural Modulus | 775,000 psi | — |
| Shrinkage | 0.007 in. / in. | 0.002 in. / in. |
| Heat Deflection Temp | 187 °F | — |
Product Description
EpoxAcast™ 650 BLACK + HT Hardener
EpoxAcast™ 650 Black is a mineral filled general purpose casting epoxy that is low cost and versatile. It features a low mixed viscosity for minimal bubble entrapment.EpoxAcast™ 650 Black is used for making hard dies for metal stamping as well as patterns and fixtures. It is also used for electrical encapsulation to extend the life cycles and enhance the performance of potted electronic devices. The high compressive strength of EpoxAcast™ 650 Black makes it ideal for making stamping dies for production pressing of metal ornaments.
› Click here for more EpoxAcast™ resin products.
KX Flex™ 40
KX Flex™ Series urethanes are fast setting flexible urethane casting elastomers that cure quickly and offer exceptional physical and performance properties including high impact resistance. KX Flex™ Series urethanes are easy to color using SO-Strong™, UVO™ or IGNITE™ colorants. KX Flex™ urethanes are phthalate free, mercury free and MOCA free.
KX Flex™ Series urethanes have a pot life of 2.5 minutes and handling time of 30 minutes (depending on mass). With Shore hardness values of 40A, 60A and 90A, this material is used for a variety of applications including fast mold making, fast model duplication, prototyping, durable miniatures, props and special effects, or making parts that are impact resistant. Fully cured castings are flexible, tough and durable.
Cured KX Flex™ 40 will have a slight tack which will subside over time depending on mass and ambient temperature.