Cost-Effective Use of Tetramethyl Dipropylenetriamine (TMBPA) in Automotive Body Fillers Abstract: Automotive body fillers are essential materials used for repairing and reshaping vehicle bodies. The performance of these fillers significantly impacts the final appearance, durability, and corrosion resistance of the repaired area. Tetramethyl dipropylenetriamine (TMBPA), a tertiary amine, serves as a crucial catalyst in the...