Coscat™ 83 Catalyst

Coscat™ 83 is a proprietary organobismuth compound which was specifically developed as a catalyst for 2-component polyurethane systems. This catalyst is recommended as a sole or co-catalyst in urethane elastomer systems typically requiring lead, mercury or tin catalysts. Coscat 83 Catalyst has a high selectivity toward the polyol-isocyanate reaction, thus avoiding bubble generation at low levels of moisture.


Excellent general purpose catalyst for any polyol-isocyanate reactions. 

Applications include room temperature & moderate to rapid catalysis for RTV (Room Temperature Vulcanization) Silicones.

Coscat 83 Catalyst catalyzed RTV silicones begin to cure immediately upon being exposure to air. They work effectively as a sealants that are water-resistant, adhesive, and hold their shape. They are most commonly used in wet environments such as building, bathroom, and kitchen sealants.

Applications include room temperature & moderate to rapid catalysis for elastomers. RTV Silicone Gasket is a single component vulcanizing elastomeric gasket for mechanical parts providing tough & flexible seal.  


Typical Properties

Additional Information
Organobismuth in Carboxylic Acid
16.5% Bi
Coatings, Polyurethane (PU) Elastomers
General Urethane Catalyst

Application Highlights

Urethane Reaction

Ideal for catalyzing Castor
Polyol-Isocyanate reactions.


One component
water-resistant sealants.

Liquid Applied Gaskets

High performance
mechanical seals. 

Additional Resources

Available upon request. Please use the Contact Us form. 

Available upon request. Please use the Contact Us form. 

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