WD-40
 | |
 A can of WD-40 with Smart Straw | |
| Product type | Water displacer |
|---|---|
| Owner | WD-40 Company |
| Country | San Diego, California, United States |
| Introduced | 1958 |
| Website | www |
WD-40 is 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, and it became available as a commercial product in 1958. It acts as a lubricant, rust preventive, penetrant and moisture displacer. In 2014, it was inducted into the International Air & Space Hall of Fame at the San Diego Air & Space Museum.