1,4-Butanediol diglycidyl ether is widely used as a reactive diluent in epoxy resin formulations. It helps reduce the viscosity of epoxy systems, making them easier to handle and apply, particularly in coatings, adhesives, and composite materials. Its epoxy functional groups enable it to participate in crosslinking reactions, enhancing the mechanical properties, chemical resistance, and durability of the cured materials. In the electronics industry, it is utilized in encapsulants and insulating materials due to its excellent electrical insulation properties. Additionally, it finds application in the production of advanced composites for aerospace and automotive industries, where high-performance materials are required. Its versatility also extends to use in surface coatings, where it improves adhesion and provides a protective layer against environmental factors.