Hexamethylene diisocyanate is primarily used in the production of polyurethane-based materials, which are widely applied in various industries. It serves as a key component in the manufacture of coatings, adhesives, sealants, and elastomers, offering durability, flexibility, and resistance to abrasion and chemicals. In the automotive sector, it is utilized in the production of lightweight and durable parts, such as bumpers and interior components. Additionally, it is employed in the creation of high-performance foams used for insulation in construction and refrigeration. Its ability to form strong bonds makes it valuable in adhesive applications for textiles, footwear, and packaging. Furthermore, it is used in the synthesis of specialty polymers for industrial and consumer goods, enhancing their mechanical and thermal properties.