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Sealants and Adhesives
Catalysts for Sealants
Sealants are widely used in construction, automotive, electronics, and industrial applications due to their outstanding flexibility, weatherability, and resistance to temperature extremes. Dorf Ketal‘s Tyzor® catalysts provide high-performance curing, crosslinking, and adhesion enhancement in neutral-cure silicone formulations, particularly those based on Room-Temperature Vulcanizing (RTV) technologies.
Tyzor® titanates function as multifunctional additives in RTV silicone sealants. Their primary roles include acting as curing catalysts, crosslinkers, water scavengers, and adhesion promoters. In neutral-cure systems—especially alkoxy-based formulations—they serve as environmentally friendly alternatives to traditional organotin compounds, which are increasingly restricted due to toxicity concerns. Titanates provide comparable performance with lower ecological and health risks.
A typical neutral-cure RTV silicone sealant includes hydroxyl-terminated polydimethylsiloxane (OH-PDMS), alkoxy-functional silanes (such as methyltrimethoxysilane, or MTMS), and a titanate catalyst. When exposed to atmospheric moisture, the titanate accelerates the crosslinking of silanol groups with alkoxy silanes, resulting in a durable, elastic silicone network. Tyzor® catalysts ensure consistent curing even under variable humidity and temperature conditions.

Tyzor® Solutions
Tin-Free Curing for RTV Silicones
Tin-Free Curing for RTV Silicones
Enhanced Adhesion to Substrates
Enhanced Adhesion to Substrates
Low-Odor, Low-Color Systems
Low-Odor, Low-Color Systems
Stable Moisture Cure Across Conditions
Stable Moisture Cure Across Conditions
Better Filler Compatibility and Shelf Life
Better Filler Compatibility and Shelf Life
Oxime-Free, REACH-Compliant Cure
Oxime-Free, REACH-Compliant Cure
Smart Reactivity for Sealants
Smart Reactivity for Sealants
Furthermore, Tyzor® catalysts help address VOC and REACH compliance for global markets by eliminating the need for volatile amines or high-toxicity curing agents. In oxime- or acetoxy-based systems, where cure byproducts like MEKO or acetic acid can raise safety or regulatory concerns, Dorf Ketal is actively developing new titanate-based alternatives to extend the benefits of tin-free chemistry across all RTV technologies.
Whether used in curtain wall glazing, expansion joints, or industrial gaskets, Tyzor® catalysts enable formulators to achieve a balance of processing flexibility, mechanical strength, and environmental compliance—setting a new standard for performance in the silicone sealant industry.
Recommended Products
Subcategory/Type
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Primary Products
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Silicone
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Tyzor 722, Tyzor 726, Tyzor 728, Tyzor 9000, Tyzor AA-105, Tyzor AA-75, Tyzor IBAY, Tyzor PITA, Tyzor PITA-SM.
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