WD-40 is one of those products that seems to have a solution for almost every problem in the garage. From loosening stubborn bolts to silencing squeaky hinges, the familiar blue-and-yellow can has become a staple for DIY mechanics and professional technicians alike.
But despite its widespread use, many drivers aren't completely sure what the spray actually does—or whether it's really a lubricant, a cleaner, or something else entirely. The truth is that WD-40 Multi-Use Product was originally developed to displace water, but its uses extend well beyond that.
