Polytetramethylene Ether Glycol is widely used in the production of high-performance elastomers and polyurethanes. Its primary application is in the manufacture of spandex fibers, which are essential for creating stretchable fabrics used in sportswear, swimwear, and undergarments. Additionally, it serves as a key component in the formulation of thermoplastic polyurethane (TPU) for applications such as automotive parts, footwear, and industrial hoses due to its excellent flexibility, durability, and resistance to abrasion. It is also utilized in coatings and adhesives, providing enhanced elasticity and adhesion properties. In the medical field, it is employed in the production of biocompatible materials for devices like catheters and surgical tubing, owing to its stability and non-toxic nature.