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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 1,500 cps | 5,000 cps |
| Mix Ratio By Volume | 1A:1B | N/A (gram scale required) |
| Pot Life | 30 minutes | 3 hours |
| Barcol 935 Hardness | — | 93 |
| Shore A Hardness | 40 | — |
| Specific Volume | 27.2 cu. in./lb. | 18.22 cu. in./lb. |
| Color | Off White | Black |
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
| ReoFlex™ 40 | EpoxAcast™ 650 BLACK + HT Hardener | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 1,500 cps | 5,000 cps |
| Mix Ratio By Volume | 1A:1B | — |
| Mix Ratio By Weight | 1A:1B | 100A:10B |
| Pot Life | 30 minutes | 3 hours |
| Cure Time | 16 hours | Twenty Four Hours Followed By Post Cures |
| Barcol 935 Hardness | — | 93 |
| Shore A Hardness | 40 | — |
| Specific Gravity | 1.02 g/cc | 1.52 g/cc |
| Specific Volume | 27.2 cu. in./lb. | 18.22 cu. in./lb. |
| Color | Off White | Black |
| Die C Tear Strength | 85 pli | — |
| Tensile Strength | 490 psi | — |
| Tensile Modulus | — | 1,079,000 psi |
| Ultimate Tensile | — | 6,900 psi |
| Tensile Elongation | — | 0.82 % |
| Elongation @ Break | 1,000 % | — |
| 100% Modulus | 73 psi | — |
| Compressive Strength | — | 15,980 psi |
| Compressive Modulus | — | 134,000 psi |
| Flexural Strength | — | 10,850 psi |
| Flexural Modulus | — | 775,000 psi |
| Shrinkage | <.001 in. / in. | 0.007 in. / in. |
| Heat Deflection Temp | — | 187 °F |
Product Description
ReoFlex™ 40
ReoFlex™ urethane rubbers offer superior physical and performance properties for production casting of wax, plasters, and resins. ReoFlex™ urethanes are available in 20A, 30A, 40A, 50A and 60A Shore hardnesses and feature convenient one-to-one by volume mix ratios. Vacuum degassing is not necessary and ReoFlex™ rubbers cure with negligible shrinkage to a durable rubber that will last in production. ReoFlex™ “Wet” rubbers will shrink somewhat over time vs. “Dry” formulations.
ReoFlex™ mold rubbers are used for a variety of applications including making molds to reproduce sculpture and architectural elements, as well as for making special effects, toys and prototypes. Vibrant colors can be achieved by adding So-Strong™ Color Tints, available from Smooth-On.
Casting Concrete? Look into the VytaFlex™ series of urethane mold rubbers. VytaFlex™ urethanes were formulated specifically for casting concrete / pigmented concrete and feature Smooth-On’s exclusive ‘V-Polymer™’ technology.
FOR COMMERCIAL/INDUSTRIAL USE ONLY
› Click here for more ReoFlex™ rubber products.
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.