| Grade | Mooney Viscosity [ ML 1+4, 100°C ] |
Crystallization Rate | Other Characteristics |
| WB | 42 - 51 | Medium | Best extrusion and calendering properties |
| WXK | 73 - 89 | Slightly Slow | Good low temperature properties with better extrudability |
| WXKT | 106 - 117 | Slightly Slow | Higher viscosity version of WX-K for high loading use |
| SND37 | 73 - 89 | Slightly Slow | Better extrusion version of WX-K with improved mold release |