K-Kat® XK-628

Bismuth carboxylate. Acts as a catalyst. Possesses excellent gloss retention and exterior durability properties. Provides improved hydrolytic stability compared to other bismuth carboxylate catalysts. It is soluble in aromatics, aliphatics and glycol ethers. Has limited solubility in esters & alcohols and is insoluble in water. Can be added directly to a single component blocked isocyanate system or the polyol component of a 2K system. Used in ambient, force dry and bake systems. Applicable for blocked isocyanate and two component urethane coatings. Recommended usage levels include 0.03-0.5% as supplied on total resin solids for 2-component polyurethanes and 0.5-2.0 % as supplied on total resin solids for blocked isocyanates.