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Key Differences
| Product Type |
|
|
| Mixed Viscosity | Brushable | Paste |
| Pot Life | 20 minutes | 10 minutes |
| Cure Time | 16 hours | 24 hours |
| Shore D Hardness | — | 70 |
| Shore A Hardness | 50 | — |
| Elongation @ Break | 400 % | 1.5 % |
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
| Brush-On™ 50 | Plasti-Paste™ | |
|---|---|---|
| Product Type |
|
|
| Mixed Viscosity | Brushable | Paste |
| Mix Ratio By Volume | 1A:1B | 1A:3B |
| Mix Ratio By Weight | 100A:125B | 41A:100B |
| Pot Life | 20 minutes | 10 minutes |
| Handling Time | — | 90 minutes |
| Cure Time | 16 hours | 24 hours |
| Shore D Hardness | — | 70 |
| Shore A Hardness | 50 | — |
| Specific Gravity | 1.17 g/cc | 1.16 g/cc |
| Specific Volume | 23.7 cu. in./lb. | 23.9 cu. in./lb. |
| Color | Off White | Off White |
| Die C Tear Strength | 80 pli | — |
| Tensile Strength | 500 psi | — |
| Tensile Modulus | — | 168,100 psi |
| Ultimate Tensile | — | 1,600 psi |
| Elongation @ Break | 400 % | 1.5 % |
| Compressive Strength | — | 3,420 psi |
| Compressive Modulus | — | 48,800 psi |
| Flexural Strength | — | 3,410 psi |
| Flexural Modulus | — | 150,000 psi |
| Shrinkage | <.001 in. / in. | 0.005 in. / in. |
| Heat Deflection Temp | — | 130 °F |
Product Description
Brush-On™ 50
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.
Plasti-Paste™
Plasti-Paste™ is a two component fiber resin that is designed for vertical surface application. Part A is a liquid and Part B is a paste. Mix ratio is 1A : 3B by volume (41A:100B by weight). It has no odor and pot life is 8 – 10 minutes depending on mass. Demold time (can be handled) is about 90 minutes depending on mass. Plasti-Paste™ holds a vertical surface without sagging and cures to a strong, durable and lightweight plastic. Suitable as a mother mold / support shell (reinforces shape of rubber mold during casting). Can be pigmented with So-Strong™ color tints from Smooth-On. Add Ure-Fil™ 9 as an extender or for special effects.