Terms of the Trade: What Is WD-40? Terms of the Trade: What Is WD-40?

You would be hard-pressed to find a DIYer without a can of this in their garage or tool kit. WD-40 is known as the “can with a thousand uses,” and for good reason. The lubricant displaces water and penetrates oil, making it perfect for everything from greasing hinges and removing sticker residue to loosening stubborn hardware. Created in 1953 by a chemist who wanted a product to prevent corrosion, the ingredients remain secret to this day.

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