Metacure T-12 Organotin Air Products Catalysts / Accelerators / Vulcanizing agents PU - Prepolymers SEALANT ADHESIVE Introduction Metacure T-12 catalyst is a liquid organotin compound which is an effective catalyst in the production of polyurethane coatings, adhesives and sealants. Since pure dibutyl tin dilaurate is a solid at room temperature, Metacure T-12 catalyst has been specifically formulated to remain liquid at temperatures above 65°F (18°C) to permit easier handling in most applications. The residual free acid level is low and the product is noncorrosive to iron in the absence of moisture. Features and Benefi ts Used in both one-part moisture cure and two-part polyurethane coatings, adhesives and sealants. Useful with all types of isocyanates: aromatic and aliphatic. Selective for the isocyanate/polyol reaction; therefore, minimizing the isocyanate/water reaction eliminates blistering and bubble formation in the coating. Because Metacure T-12 catalyst is resistant to air oxidation, it can be masterbatched in two-part polyurethane coatings, adhesives and sealants. How to Formulate In one-part moisture cure systems, Metacure T-12 catalyst works best when added in the final let-down stage. In two-part systems, Metacure T-12 catalyst must be added to the polyol side. In both cases, typical use levels range from 0.05–0.20 parts per hundred polyol. Organotin (Dibutyltin dilaurate) catalyst in production of polyurethane adhesives and sealants. Liquid at temperatures above 18°C to permit easier handling. Low residual free acid level, noncorrosive to iron in the absence of moisture.