Polytetramethylene Ether Glycol is widely used in the production of polyurethane elastomers, which are essential in manufacturing flexible foams, coatings, adhesives, and sealants. Its excellent elasticity and durability make it a key component in high-performance spandex fibers, commonly found in athletic wear and stretchable clothing. Additionally, it is utilized in the creation of thermoplastic polyurethanes (TPUs) for applications like automotive parts, footwear, and industrial hoses due to its resistance to abrasion and chemicals. In the medical field, it is employed in biocompatible materials for devices such as catheters and surgical tubing. Its low-temperature flexibility and hydrolytic stability also make it suitable for use in hydraulic fluids and lubricants.