Sec-butyl crotonate is primarily used as a chemical intermediate in the production of various polymers and resins. Its application is significant in the synthesis of specialty chemicals, where it acts as a monomer or co-monomer to enhance the properties of the final product, such as flexibility, durability, and resistance to environmental factors. In the coatings industry, it is utilized to formulate high-performance paints and varnishes that require excellent adhesion and weather resistance. Additionally, sec-butyl crotonate finds use in the manufacturing of adhesives and sealants, contributing to improved bonding strength and elasticity. Its role in the production of plasticizers is also noteworthy, as it helps in modifying the physical properties of plastics to achieve desired softness and workability.