WD-40

WD-40 is an American brand and the trademark of a penetrating oil manufactured by the WD-40 Company based in San Diego, California. Its formula was invented for the Rocket Chemical Company in 1953, before it became the WD-40 Company. WD-40 became available as a commercial product in 1961. It acts as a lubricant, rust preventive, penetrant and moisture displacer. There are specialized products that perform better than WD-40 in each of these uses, but WD-40's flexibility has given it fame as a jack of all trades. WD-40 stands for Water Displacement, 40th formula.

This article is about the product. For its manufacturer, see WD-40 Company. For the biomolecular structure, see WD40 repeat.

WD-40
WD-40 with Smart Straw
Product typeWater displacer
OwnerWD-40 Company
CountrySan Diego, California, United States
IntroducedSeptember 23, 1953 (1953-09-23)
Websitewww.wd40.com

It is a successful product to this day, with steady growth in net income from $27 million in 2008 to $70.2 million in 2021. In 2014, it was inducted into the International Air & Space Hall of Fame at the San Diego Air & Space Museum.

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