Diphenylglycoluril is commonly used as a cross-linking agent in the production of polymers and resins. It enhances the thermal stability and mechanical strength of these materials, making them suitable for high-performance applications such as coatings, adhesives, and composites. Additionally, it is employed in the synthesis of specialty chemicals, where it acts as a key intermediate to produce compounds with specific functional properties. Its role in improving the durability and resistance of materials makes it valuable in industries like automotive, aerospace, and electronics.