Fomrez UL-6 catalyst Dibutyltin mercaptide Crompton-OSI Specialties Catalysts / Accelerators / Vulcanizing agents >> Organometallics PU - Prepolymers Organotin catalyst offers urethane formulators important activity advantages over dibutyltin dilaurate (DBTDL). It provides an important delayed-action catalytic effect, which in elastomer formulations allows increased pot life at ambient or low temperatures. Final cure times at elevated temperatures generally are equivalent to those obtained with dibutyltin dilaurate. In molded, rigid, and elastomer foam systems, this delayed action facilitates enhanced filling of mold cavities prior to the onset of foaming or gelation. Dibutyltin Mercaptide Dibutyltin Mercaptide catalyst. Provides an important delayed-action catalytic effect, which in elastomer formulations allows increased pot life at ambient or low temperatures.