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Key Differences
| Product Type |
|
|
| Mixed Viscosity | 430 cps | Brushable |
| Pot Life | 7 minutes | 20 minutes |
| Cure Time | 60 minutes | 16 hours |
| Shore D Hardness | 61 | — |
| Shore A Hardness | — | 40 |
| Color | Translucent White | Off White |
| Tensile Strength | 2,420 psi | 300 psi |
| Elongation @ Break | 100 % | 1,000 % |
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
| Smooth-Cast™ 61D | Brush-On™ 40 | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | 430 cps | Brushable |
| Mix Ratio By Volume | 1A:1B | 1A:1B |
| Mix Ratio By Weight | 100A:93B | 100A:125B |
| Pot Life | 7 minutes | 20 minutes |
| Cure Time | 60 minutes | 16 hours |
| Shore D Hardness | 61 | — |
| Shore A Hardness | — | 40 |
| Specific Gravity | 1.05 g/cc | 1.17 g/cc |
| Specific Volume | 26.4 cu. in./lb. | 23.7 cu. in./lb. |
| Color | Translucent White | Off White |
| Die C Tear Strength | — | 60 pli |
| Tensile Strength | 2,420 psi | 300 psi |
| Elongation @ Break | 100 % | 1,000 % |
| Shrinkage | 0.012 in. / in. | <.001 in. / in. |
Product Description
Smooth-Cast™ 61D
The Smooth-Cast™ Semi-Rigid line of low-cost semi-rigid urethane casting resins cure quickly to semi-rigid plastics that offer exceptional strength and impact resistance.
New Formulations – New Look!
Smooth-Cast™ 61D is newly reformulated with a translucent white appearance and improved physical properties. All Smooth-Cast semi rigids are now mercury free and phthalate free. These plastics are easy-to-use (mix ratio is 1A:1B by volume) and have low viscosities for minimal bubble entrapment. Vibrant colors are possible by adding SO-Strong™, UVO™ or Ignite™ colorants.
These semi-rigid plastics are good for making impact resistant prototypes, models, toys, props, climbing holds, etc.
› Click here for more Smooth-Cast™ resin products.
Brush-On™ 40
Smooth-On’s Brush-On™ Series of mold rubbers are extremely versatile and are famous for their abrasion resistance and high tear strength. They have the convenience of a one-to-one mix ratio and are easy to mix and apply with a brush or spatula.