Isooctyl mercaptoacetate is primarily used as a chemical intermediate in the production of various polymers and plastics. It acts as a chain transfer agent in polymerization processes, helping to control the molecular weight and improve the properties of the final polymer. This compound is particularly valuable in the synthesis of acrylic and vinyl polymers, where it enhances flexibility, durability, and processing characteristics. Additionally, it finds application in the production of adhesives, coatings, and sealants, where it contributes to better adhesion and resistance to environmental factors. Its role in modifying polymer structures makes it essential in industries aiming for high-performance materials.