Nonamethylene glycol dimethacrylate is primarily used as a crosslinking agent in the production of polymers and resins. Its application is significant in the manufacturing of dental materials, where it enhances the durability and strength of dental composites and adhesives. In the field of coatings and adhesives, it contributes to improved mechanical properties and chemical resistance. Additionally, it is utilized in the creation of contact lenses and other optical devices, providing flexibility and clarity. The chemical also finds use in the development of hydrogels for medical applications, such as drug delivery systems and wound dressings, due to its ability to form stable, biocompatible networks.