Di-tert-butyl adipate is primarily used as a plasticizer in the production of polymers and resins. It enhances the flexibility, durability, and processing properties of materials like PVC, making them more suitable for applications in the manufacturing of cables, films, and coatings. Additionally, it is utilized in the formulation of adhesives and sealants, where it improves workability and adhesion properties. In the cosmetics industry, it serves as an emollient and solvent in personal care products, contributing to a smooth texture and enhanced spreadability. Its low volatility and stability also make it a preferred choice in high-temperature industrial processes.