Butyl hydroxyethyl fumarate is primarily used in the polymer and coatings industry. It acts as a reactive monomer in the production of resins and polymers, enhancing properties such as flexibility, durability, and adhesion. This chemical is often incorporated into coatings for surfaces like wood, metal, and plastics, providing improved resistance to weathering, chemicals, and abrasion. Additionally, it is utilized in the formulation of adhesives and sealants, where it contributes to better bonding strength and longevity. Its compatibility with various substrates makes it a versatile component in industrial and consumer product applications.