2-Octylbenzimidazole is primarily used as a corrosion inhibitor in industrial applications, particularly in metalworking fluids and lubricants. It helps protect metal surfaces from rust and degradation by forming a protective layer that prevents the interaction of moisture and corrosive agents with the metal. This compound is also employed in the formulation of coatings and paints to enhance their durability and resistance to environmental factors. Additionally, it finds use in the production of certain polymers and plastics, where it acts as a stabilizer, antioxidant, and UV protector to improve their performance under harsh conditions by reducing degradation from oxidation and UV radiation. Its effectiveness in these applications makes it a valuable component in extending the lifespan of materials and machinery.