Fomrez UL-28 catalyst Dimethyltin carboxylate OSI Specialties Catalyst / Accelerator >> Organometallic Polyurethane Catalyst for various types of urethane systems. Can be used as a cost/performance replacement in any process currently using DBTDL, such as the manufacture of rigid or high-resilience (HR) flexible urethane foams, microcellular elastomers room-temperature-vulcanized (RTV) silicone polymers or polyurethane coatings. Offers low freezing point. Dimethyltin carboxylate. Used as a catalyst for polyurethane coatings. Offers low freezing point.