We may receive a commission on purchases made from links. WD-40 was developed in the late 1950s by the Rocket Chemical Company as a rust preventative for the aerospace industry. The letters W and D ...

WD-40 is a seemingly all-purpose lubricant, degreaser, and water displacer that has helped people loosen stubborn bolts and silence squeaking hinges for decades. There's an old saying that if you need ...