The Best Penetrating Oil For Your Rusty Nuts Or Bolts – What You Need To Know

Penetrating oil is a liquid with very low viscosity. Its main function is to loosen the mechanical parts that have got rusted so they can be easily removed and replaced. The product is capable of getting into thin space where the threads of the rusted parts meet. The penetrating oil is very versatile you can use it as a lubricant, corrosion preventer, and cleaner.

If you are in search for some trusted penetrating oil, below are some of the best penetrating oil that you can consider.

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Functions Of Penetrating Oil

The primary function of the penetrating oil is to loosen corroded, frozen, or seized fasteners. It is low in viscosity that enables the fluid to move and enter into crevices, pores, and threads of a material’s substrate.

Most of the penetrating oils are combined with a lubricant and a solvent, with a primary role to reduce its viscosity and thin down the lubricant. Other functions of the penetrating oil are as follows:

best penetrating oil

As a short-term lubricant. The oil reduces the friction coefficients, but since it contains solvents, they are volatile, evaporates easily and gets contaminated fast which leaves only a thin film. Choose penetrating oils with additives for lasting lubrication. It should be used to substitute the industrial lubricants because they do not offer the same rate of fatigue.

As a cleaning agent, the penetrating oils are ideal for removing adhesives, greases, tars, and rust. The oil acts as a degreaser or solvent cleaner to remove the contaminants. Once the product mobilizes the residue it is easier to remove using light abrasive, tack cloth or wipe.

Resist corrosion. The oil prevents and stops corrosion. Most of the products have water dispersing features that prevent oxidation upon application by displacing the moisture.

Types Of Penetrating Oil

best penetrating oil

Via directindustry.com

1. Micro-Dispersant Penetrating Oils

This type of penetrating oil are fire resistant and have solid lubricant particles that are found in a natural or synthetic oil base. The particles can be any type of solid lubricant. Example of this is the boron nitride, graphite, and polytetrafluoroethylene. The oil based can be any kind of liquid oil.

2. Straight And Soluble Oil Fluids

This sort of penetrating oil is very common for mechanical purposes. It has high water content that improves its resistance to fire. Soluble oil with high water content should be used in high chances of the oil igniting.

Top 3 Best Penetrating Oils

**Below, you'll see more detailed reviews, but you can also click the links above to see current prices and read customer's reviews on Amazon.

Kano Kroil Liquid Penetrating Oil

Via Amazon.com

Kano Kroil is a popular penetrating oil that loosens the stuck metal parts. The product involves a scientific principle that reduces the surface tension so it can penetrate into openings as small as 1,000,000 of an inch.


The product loosens frozen metal joints easily. It dissolves gum, oil, and dried grease without damaging the metal. Kano Kroil displaces water, prevent rust and provides lubrication.

Pros

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    Easily loosens stuck metal joints
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    Lubricates stops rust and displaces water
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    Gets rid of gum, oil and dried grease without damaging the metal.

Cons

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    It is effective enough that if left on other parts, it may loosen them and cause them to fall off.

3 in One 10038 Multi-Purpose Penetrating Oil

Via Amazon.com

This penetrating oil is available in 8 ounces and can be used to surfaces to remove grime and grease, decrease friction, and loosen rusted metal parts. The product also eliminates the squeaking sound in the components like the hinges and wheels.


To control the amount of lubrication dispensed it has drip applicator. This ensures that upon squeezing the bottle you will be able to dispense the exact amount required.

Pros

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    This product decreases the friction and eliminates annoying squeaky sounds in components like hinges and wheels.
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    The oil penetrates into crevices to free parts that have been corroded together.
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    It gets rid of grime and remove dirt.
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    Available in 8 ounces easy to squeeze bottle.
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    With drip applicator to help dispense the right amount.

Cons

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    Problem with the loose cap that may result to oil to leak if not properly stored.

Liquid Wrench Penetrating Oil 5 oz.

Via Amazon.com

The Liquid Wrench Penetrating Oil gets rid of stuck bolts, nuts, and locks, and also penetrates the grease and eliminates the rust. This penetrating oil is anti-seize, loosens stuck bolts, and fast-acting product that prevents corrosion in various components. With its high lubricity, low viscosity, high solvency and low surface tension, this product can sneak into the toughest rust.

This penetrating oil is recommended to solve stuck bolts, locks and a lot more. It can break through stuck and corroded parts making your life much easier.

Pros

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    It is a multi-purpose penetrating oil
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    It is available in a convenient aerosol container
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    More powerful, accurate spray pattern 
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    It is a fast penetrating solvent
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    Low odor
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    It loosens rusted nuts, bolts and other components within a few minutes
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    Safe on painted surfaces

Cons

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    Some users are complaining about the red wand that does not fit into the nozzle. It is quite annoying trying to fit the wand into the nozzle.
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    Not available in Catalina Island.

Conclusion

The best penetrating oil is a versatile product that infiltrates, cleanses and loosens the corroded components. It keeps the parts protected against corrosion and rust and cleans tar, grease, and lubricates moving parts. All these features make the penetrating oil very useful.

The three products reviewed above have these qualities. You can choose your preferred product base on their pros and cons. Oil lubricants can either have petroleum or synthetic bases.

A combination of oil lubricant and a thickening agent has a thick consistency that let you use the liquids that can be retained and entailed less frequent changes. Although there are three penetrating oils mentioned above, we recommend Kano Kroil penetrating oil because of its versatility and effectiveness. If you find this post helpful, you can share this with others.

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