Which penetrating oil

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Interested in More Topics Like This? There are many applications, especially in maintenance, where you need to remove mating parts — like a bolt and nut or fastener — that are frozen together by rust, surface contaminants, etc. For a penetrating oil to work, you need to get the friction-reducing agents usually lubricants of some type into the area where the threads or mating parts are bound up. Powerful solvents in a high-performance penetrating oil can dissolve and pierce surface contaminants that otherwise get in the way of getting the penetrant where it needs to be.

Apply it to a rusted stuck nut or stuck bolt and it soaks into the crud, helping free things up. This 8-ounce can comes with a convenient applicator nozzle that allows you to apply a small amount of product exactly where it's needed, because a little bit goes a long way.

There's no need to saturate everything in sight. Kroil is safe for use on a range of materials including plastic and rubber, so there's little need to worry about it reacting negatively should you spill some.

Kroil lubricant does not harden or gum up over time, so it lasts practically forever. Unless you're running a chop shop out of your pole barn, one can of this penetrating lubricant will probably last a lifetime.

For more convenience, consider purchasing PB B'laster. Sold in a pressurized spray bottle, it's far easier to apply this product to metal parts in hard-to-reach places, or especially to the bottom of horizontal surfaces or parts. PB B'laster has been around for more than 60 years, and according to the manufacturer, it's been the best-selling penetrating fluid since For a product to have such staying power, it must work as advertised, and PB B'laster certainly does.

Spray it on a rusted nut or seized bolt and let it do its thing, cutting through crud and oxidation. Not only does PB B'laster help break stubborn rusted parts loose, it also leaves behind a protective coating that can act as a rust inhibitor helping to prevent corrosion on metallic parts from forming in the future.

Liquid Wrench penetrating oil should do most of what the other products on this list can to combat a rusty bolt, but for a lot less money. Not that any of these oils are that costly, but this product is less than four bucks for an ounce spray can, making it about one-third as expensive as PB B'laster. Its special oil mixture formulation cuts through grease, plus it penetrates rust and corrosion to help loosen fasteners that otherwise seem stuck forever.

It's low in volatile organic compounds and safe to use on metal, painted surfaces and plastic, plus it's guaranteed to work by the manufacturer. What separates Knock'er Loose Plus oil spray from the other penetrating oils on this list? Well, other than the, ahem, suggestive name. Can you say freeze shock action? Unlike competing rust penetrant products, this lubricating oil one actually drops the temperature of the contact area, which supposedly helps the oil penetrate quicker and reach deeper.

Maybe leave the blowtorch in the toolbox with this one.