WD-40 is world-famous for its water displacement properties, the benefits of which include rust protection. Thanks to its lower surface tension, WD-40 can push water droplets away completely. This leaves tools, components and surfaces free of moisture that would otherwise cause corrosion and rust.This time we’ll be putting that claim to the test! We placed four identical metal nails into beakers of tap water; one untreated, two coated in competitors’ products, and one coated with WD-40. The result? Take a look at our time-lapse video to see the evidence for yourself.