Used primarily as a reactive diluent and crosslinking agent in the production of unsaturated polyester resins. It plays a key role in fiberglass-reinforced plastics, which are widely applied in automotive parts, marine vessels, and corrosion-resistant tanks and pipes. Its vinyl groups enable participation in free-radical curing processes, enhancing the mechanical strength and thermal stability of the final polymer network. Also utilized in specialty coatings and composites requiring high durability and chemical resistance.