Kroil Original Penetrating Oil (Aerosol Spray-16.5oz Can-Single), Penetrant for Rusted Bolts, Metal, Hinges, Chains, Moving Parts, Rust, Corrosion Inhibitor (KS162)

Kroil Review I use Kroil at work for a major airline, and it's hands-down the best penetrating oil I've ever used. Whenever we run into seized bolts, nuts, plugs, or any other stubborn fittings, the first thing our aircraft mechanics do is soak it down with Kroil. It works 100% of the time — flawlessly. No matter how stuck or corroded a fastener seems, Kroil finds its way in and breaks it loose without damaging threads or parts. It's become a go-to tool in our maintenance routine, and I wouldn't want to be without it. Simply put: if it's stuck, Kroil will free it.

when i first found out about kroil i worked at a caterpillar in the 90'S ,dealership in virginia, the exhaust studs on a diesel motor were rusted to the point of breaking off along with a large array of different bolts and nuts, in the 2000's i worked for an envelope company for 25 years and the only spray for such a situation was kroil. been in my tool box sense 1984 and still impressed with it today. there is no other !!