Toluene diisocyanate (TDI) is a chemical used in the production of polyurethanes, primarily for flexible foam applications including furniture, bedding and carpet underlay, as well as packaging applications. TDI is also used in the manufacture of coatings, sealants, adhesives and elastomers. In transportation applications, TDI helps produce lighter automobile parts, saving weight, which leads to improvements in fuel efficiency and thus energy conservation.