WD-40 has countless uses for auto repair and around your home, but can it substitute for dielectric grease as a protective moisture barrier?

Are your spark plug boots stuck or arcing? A simple tube of dielectric grease could save your ignition system. Here is the right way to apply it to your car.

Can of WD-40 and tube of permatex dielectric grease side by side on white background - WD-40 & Permatex/Amazon If you're a home mechanic you've probably dealt with dielectric grease at some point.