Polytetramethylene ether glycol is widely used in the production of high-performance elastomers, particularly in the manufacturing of spandex fibers, which are essential in the textile industry for creating stretchable fabrics like sportswear, swimwear, and undergarments. Its excellent flexibility, durability, and resistance to abrasion make it a key component in polyurethane elastomers, which are utilized in automotive parts, industrial hoses, and seals. Additionally, it is employed in the formulation of coatings and adhesives, providing enhanced moisture resistance and mechanical properties. In the medical field, it is used in the development of biocompatible materials for devices such as catheters and surgical implants due to its stability and non-toxic nature. Its applications also extend to the production of thermoplastic polyurethanes, which are used in footwear, gaskets, and other molded products requiring high elasticity and strength.