Penetrate 90 is a high performance penetrating oil that lubricates all types of moving parts that have become difficult to operate. Penetrate 90 is oil based and blended from our patented formula of penetrating oils, synthetic isoparaffinic hydrocarbons, special friction releasing and extreme pressure additives, and three different types of rust and corrosion inhibitors. This unique blend allows penetrate 90 to penetrate deep into the pores of metals, and cover surfaces with a light, clear lubricating film with lasting staying power. When sprayed onto rusty bolts, penetrate 90 coats each rust Particle and acts like tiny ball bearings, allowing the rust particles to easily slide over each other.