Si 291 Equivalent & Alternative
·4 min read
Si 291 — Technical Profile
Si 291 is a specialty chemical product manufactured by Evonik Industries AG (Germany). Delayed reaction, improved processing. Chemical name: Blocked mercaptopropyltriethoxysilane.
Key Specifications
| Property | Specification |
|---|---|
| Sulfur Content | 9.2% |
| Functional Group | Blocked mercapto, ethoxy |
Applications
- Tire and MRG
Looking for a Si 291 Alternative?
SEMITECH Silanes offers functionally equivalent grades that match the performance profile of Si 291. Our products are manufactured to the same international quality standards with competitive pricing and reliable supply from China.
Why choose SEMITECH Silanes as your Si 291 alternative:
- Equivalent performance — matched specifications and application behavior
- Competitive pricing — 20–40% cost advantage vs. European manufacturers
- Reliable supply — direct from manufacturer, shorter lead times
- Technical support — formulation assistance and sample testing
- Flexible MOQ — from trial quantities to container loads
Request a Sample
Ready to evaluate our Si 291 equivalent? Contact us for:
- Free sample (typically 1–5 kg)
- Full technical data sheet (TDS)
- Certificate of Analysis (CoA)
- Formulation guidance for your specific application
Si 291 is a registered trademark of Evonik Industries AG. SEMITECH Silanes products are independently developed alternatives, not produced by or affiliated with Evonik.