RU-420 A/B by Silpak is a soft, two-component, 100% solids urethane RTV elastomer. Possesses low viscosity, high flexibility, high elongation and stretch properties. Offers high tear resistance, low durometer and easier demolding (16-24 hours) of highly undercut parts. Suitable for making molds or rubber parts. Designed to cast concrete, plaster and wax parts. It is available in a mixed ratio of 50:100 by weight. Shelf life of RU-420 A/B is 6 months at 65-85°F.
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RU-420 A/B properties
Mechanical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Hardness, Shore | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Tensile Elongation | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Tensile Strength | 0.0 Visible After Login | Visible After Login | Visible After Login |
Other properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Tear Strength | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Viscosity | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Viscosity | 0.0 Visible After Login | Visible After Login | Visible After Login |
| Viscosity | 0.0 Visible After Login | Visible After Login | Visible After Login |
Physical properties
| Properties | Value & unit | Test condition | Test method |
|---|---|---|---|
| Gel Time | 0.0 Visible After Login | Visible After Login | Visible After Login |