When was wd 40 first made?

WD-40 was first developed in 1953 by a small company called Rocket Chemical Company in San Diego, California. It was created to help prevent rust and corrosion on the Atlas missile program for the aerospace industry. The name WD-40 stands for "Water Displacement, 40th formula," indicating that it was the 40th attempt to create a successful water displacement solvent. Since then, it has become a widely used multi-purpose lubricant and cleaner.