Polyethylene polyamine is widely used as a curing agent in the production of epoxy resins, enhancing their mechanical strength and chemical resistance. It is also employed in the manufacture of adhesives, coatings, and sealants, where it improves durability and adhesion properties. In the oil and gas industry, it serves as a corrosion inhibitor, protecting metal surfaces from degradation. Additionally, it is utilized in the synthesis of surfactants and lubricants, contributing to their stability and performance. Its ability to act as a cross-linking agent makes it valuable in the production of polymers and elastomers, ensuring improved thermal and chemical stability.