Diisooctyl maleate is widely used as a plasticizer in the production of polymers, particularly PVC, to enhance flexibility and durability. It is also employed in the formulation of adhesives and sealants, improving their workability and adhesion properties. In coatings and paints, it acts as a coalescing agent, aiding in film formation and providing a smooth finish. Additionally, it finds application in the manufacturing of lubricants and hydraulic fluids, where it helps reduce friction and improve performance. Its compatibility with various resins makes it a valuable component in the production of inks and printing materials.