11 Best Penetrating Oils (2023)

If you have ever encountered a bolt that won’t budge no matter how hard you try, you know the real value of penetrating oil. As the name suggests, this special type of oil has a very low viscosity that allows it to go through the tiniest gap between two tightly stuck objects.

It becomes a real lifesaver when those rusty bolts try to bring your project to a halt. Apart from handling stubborn fasteners, penetrating oil delivers a whole host of other uses such as in metal cleaning, stopping corrosion, and adhesive removal among other benefits.

Unfortunately, not all penetrating oils out there will live up to their claims. For this reason, you should ensure that you get one that you can count on when you need it most. With us are the top 11 best penetrating oils!

Top 11 Best Penetrating Oils

#1 B’laster 16-PB Penetrating Catalyst – 11-Ounces

Blaster 16-PB Penetrating Catalyst

This penetrating oil arrives in a single pack of an 11-ounce bottle. However, you can also get it in a lot of 12 or 2 depending on your needs.

It’s one of the most reliable penetrating oils in the market and that is why it boasts a very high rating by its users. The fluid is incredibly thin and will penetrate very tiny spaces better than most of the competing options in the market.

The unique capillary action along with the high-performance formula tackles rust and corrosion from all angles to bust lose the stuck objects quicker and easier without breaking a sweat.

B’laster 16-PB Penetrating Catalyst also has a non-evaporating lubricant. I mean, after loosening the stuck bolts, this penetrating oil leaves a nearly invisible thin residue on the surface to protect the objects from future corrosion.

The penetrating catalyst works for firearms, sports equipment, tools, and marine tools among other applications. B’laster 16-PB Penetrating Catalyst, however, has an unpleasant smell but this shouldn’t be a big deal given that the smell disappears only after a short period.

Reasons To Buy:

  • It uses unique capillary action.
  • It doubles up as a lubricant.
  • It attacks rust and corrosion from all angles.
  • It is affordable

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#2 3-IN-ONE Multi-Purpose Oil, 8 OZ

3-IN-ONE Multi-Purpose Oil

This penetrating oil has been in the market for more than a century. Over these years, the product has proven to be a lifesaver to professionals and enthusiastic hobbyists in their repair and maintenance projects.

It adopts a 3-in-1 design which means that it will come in handy in most of your projects more often than the single-purpose versions. Among its roles is that it lubricates the rusted bolts and threads for easy removal.

The oil also protects metal joints and other objects from rust and corrosion. But if you decide to use it for cleaning purposes, it will also not disappoint. The easy-to-use drip spout ensures that the oil goes exactly where you want it with minimal to no wastage.

The squeeze bottle design provides a reliable, easy and convenient way of controlling the amount of oil that goes out of the bottle. Also, you will like that the bottle has a fill level indicator strip.

This property allows you to know the amount of oil remaining so that you will always know whether what you have left is enough for your next project without relying on guesswork.

Reasons To Buy:

  • The spout ensures accurate application.
  • It boasts a 3-in-1 design.
  • It utilizes the bottle squeeze design.
  • It has an oil level indicator strip.

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#3 WD-40 Multi-Use Product with SMART STRAW SPRAYS 2 WAYS 8 OZ

WD-40 Multi-Use Product with SMART STRAW SPRAYS

Next on the list is yet another reliable option. This oil comes from WD-40 and is available in 8, 11, and 12-ounce bottles. It’s a multi-purpose product that uses an advanced formula to bring solutions of up to 5 problems.

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The oil penetrates between 2 tightly stuck objects and breaks the rust-to-metal bond making it easy to separate them. Its reliable formula implies that it is the go-to option the next time you encounter rusted and frozen nuts and bolts in your projects.

The product will also protect from rust, and drive out water from electrical systems. Want to remove grease or adhesive? Well, the multi-use formula is designed to also break down grease and dissolve even the strongest adhesives. Hence, no matter the kind of DIY project you turn to, you will be surprised how helpful the oil will turn.

The straw comes built on the bottle so you don’t have to worry about losing it. The application tip affords the user with multiple-spray options for increased convenience. Just flip the straw up for a precision stream for use in tight spaces and down for a large coverage spray.

Reasons To Buy:

  • The multi-use formula addresses up to 5 problems.
  • The straw offers multiple-spray options.
  • The straw is permanently connected to the can.
  • The can is available in 3 sizes.

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#4 Liquid Wrench L134-4PK Penetrating Oil – 1 Gallon, (Case of 4)

Liquid Wrench L134-4PK

If you are dealing with rusty metals, or maybe are in a heavy need for penetrating oil, you can consider directing your money to this product. The product comes in packs of 4 with each can carrying a gallon of the solvent.

As you would expect from such much, the liquid will cost you a little more than any of the previous options. However, when we talk about the cost per volume, Liquid Wrench L134-4PK Penetrating Oil is cheaper than any of the predecessors.

The oil employs a very thin and powerful formula than penetrates the tightest gaps and dissolves rust in no time; never let stuck bolts, nuts, and locks slow your project down again!

Also, unlike most penetrating oils that have a very strong smell, this product has a very low odor. Thus, if you are working in areas with low ventilation, this oil will be a good option for you.

The US-made product works on most surfaces when protecting the paint on surfaces. Therefore, expect your workpiece to maintain its original beauty even after applying the substance onto the surface.

Reason To Buy:

  • It has a very low odor.
  • It works on a painted surface.
  • It dissolves rust fast.
  • It is cheaper in terms of cost per volume.

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#5 Liquid Wrench One Each, 16 oz. L116 Penetrating Oil-16 oz

Liquid Wrench One Each

If you liked everything about our previous suggestion except the quantity, here comes the right option for you. The penetrating oil arrives in a smaller 16-ounce canister that goes at an affordable price. However, if you think that this amount is too little for your needs, this product is also available in a lot of 12.

The product is designed with users in mind and that is why most professionals and home do-it-yourselfers opt for it every time they are anticipating encountering rust-locked nuts, bolts, and locks in their projects.

The product employs the same formula as the previous sibling. Hence, it also penetrates faster and loosens 2 tightly stuck parts faster than ever. Also, the reliable formula cuts through grease. For this reason, you can always turn to it when you want to remove grease from a surface.

The low-odor design guarantees comfortable use of the product for prolonged periods. And since it is also made in the United States, you can buy it knowing that you will deliver value for your money. The precision tip lets you apply it in tight spaces more conveniently without mess.

Reasons To Buy:

  • It also removes grease.
  • The container offers a convenient amount for most projects.
  • It comes from the United States.
  • It has a precision tip.

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#6 Pipe Break 9 oz. Penetrating Oil in Single Aerosol Spray Can

Pipe Break 9 oz. Penetrating Oil

This solvent is also another quick-acting penetrant that frees frozen joints, nuts and bolts from rust. Its superb ability to break molecular bonds faster implies that you can count on it to get rusted parts apart no matter how strong they seem to be stuck.

Pipe Break 9 oz. Penetrating Oil boasts very a powerful formula that combines with the low viscosity to creep under moisture effectively for removal from the surface. This unique ability makes it ideal for use in repair and maintenance of electrical systems.

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The unique additive leaves an invisible film on the surface that protects your valuable assets from rust and corrosion. In other words, this penetrating oil not only serves in lubricating tight objects but also in removing moisture and protecting from future rust and corrosion.

To get the work done in minutes, just apply it on what you need to separate and tap it for quicker penetration, free it up, and that is it; quicker and easier than you could ever imagine! The straw provides pin-point spray that minimizes wastage.

Reasons To Buy:

  • It has a convenient straw.
  • It leaves an invisible protective film.
  • It has a very low viscosity.
  • It creeps under moisture.

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#7 CRC Knock’er Loose Penetrating Solvent, 13 oz Aerosol Can, Reddish

CRC Knock'er Loose Penetrating Solvent

This solvent works ideally for frozen and bound nuts, bolts, locks, hinges, fittings, couplings, and other metal joints. The product’s reliable formula is tested and found to outperform most members of competition in terms of penetration, speed, and protection.

I mean, no matter how stuck and impossible the joints seem not to separate, this solvent will creep in and break down rust to get you back in whatever you were doing faster than you could ever imagine.

After breaking down the rust-to-metal bond, this solvent leaves a protective layer on the joint that prevents further rust and corrosion so that you will never encounter the same struggles on the same fastener anytime in the future.

The 360-degree valve optimizes user convenience since it allows the user to spray the aerosol from any angle including upside down. But just in case you still remain unconvinced, the product complies with EPA and Volatile Organic Compound (VOC) requirements.

Reason To Buy:

  • It has a 360-degree valve.
  • It meets or exceeds EPA and VOC regulations.
  • It uses a super penetrating formula.
  • It is an industrial-strength lubricant.

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#8 Gasoila Free All Rust Eater Deep Penetrating Oil, 1.5 oz Aerosol Spray Can

Gasoila Free All Rust Eater Deep Penetrating Oi

Whether it is in automotive, marine, plumbing, or home applications, you will always encounter rust-invaded fasteners. Now, for powerful rust bonds, you need a more powerful formula to overcome.

And yes, the formula employed in this oil is super powerful to loosen any tight joints in less time and with minimal effort. The solvent has a rust-eating agent that dissolves rust in threaded connections to make driving out the fasteners more fun and easier.

Unlike other penetrating oils that evaporate in seconds without doing what you had targeted, Gasoila Free All Rust Eater Deep Penetrating Oil is a slow-evaporating solvent so it will always go in smaller amounts in your projects.

The solvent comes in three sizes; 1.5 ounces, 6 ounces, and 11 ounces to let you pick the one that goes best with your budget. Also, the oil is silicone-free to enable use on painted surfaces.

Reasons To Buy:

  • It is silicone-free.
  • It has a slow-evaporating formula.
  • It delivers results in seconds.
  • It is long-lasting since it goes in smaller quantities.

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#9 Loctite 503054 37585 Penetrating Oil, 12-Ounce

Loctite 503054 37585 Penetrating Oil

Never let rust-locked joints bring your operation to a standstill. This high-performing oil is engineered to go through cracks and small gaps easier and faster to neutralize the molecular bonds of rust in seconds.

Its low viscosity cuts through dirt, grease, and dust to find its way to the exact area causing you trouble. It also produces a thin coating that displaces water from the surface when leaving a protective film that protects your tools from future attacks by rust.

Unlike some penetrative solvents that use a toxic formula, Loctite 503054 37585 includes environmentally-friendly compounds that are powerful or rust but gentle on the environment.

The oil arrives in a 12-ounce bottle that should handle several projects. Unfortunately, the oil does not come in larger quantities so you may have to order several canisters if you need it in plenty.

Reasons To Buy:

  • It includes environmentally-friendly compounds.
  • The 12-ounce capacity is good.
  • It is affordable.
  • It also displaces water from the surface.

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#10 Kano Aerokroil Penetrating Oil, 10 oz. aerosol (AEROKROIL)

Kano Aerokroil Penetrating Oil

This penetrating oil is among the essentials you are more likely to find in toolboxes of professional plumbers, mechanics, and auto-repair enthusiasts; and for a reason! The aerosol uses a very advanced formula that penetrates up to a millionth of an inch.

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With this penetration ability, expect this solvent to creep into any crack you want it to go through. The penetration oil attacks rust by dissolving it without causing any harm to the metal. By doing this, Kano Aerokroil Penetrating Oil ensures that it eliminates just what you intended without causing any problems with the threading.

Where it passes, Kano Aerokroil Penetrating Oil leaves a protective film that will prevent rust even once it dries up. For this reason, you can also use it for prevention purposes and not necessarily always on curative applications.

The extremely thin formula even penetrates moisture to prevent the potential impact on the surface. Hence, you can consider using it on electrical appliances. Our hand-picked option will come in a 10-ounce canister but other sizes are also available in case this much seems too little for your needs.

Reasons To Buy:

  • It has an impressive penetration ability of up to millionth of an inch.
  • It is available in 3 sizes.
  • It does not cause harm to the metal.
  • It also protects and displaces moisture.

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#11 Kano Kroil Penetrating Oil, 8-ounce liquid

ano Kroil Penetrating Oil

Also coming from Kano, this is yet another penetrating aerosol you can count on to rid you of any future troubles of fasteners that won’t budge. Its high-performing ability also makes it one of the best-selling penetrating oils in the market.

The canister does not contain as much as the previous model, however, but with the slow-evaporating formula, the 8-ounce canister should be enough to handle several of your projects.

Spearheading the list of its fantastic properties is the products impressive compatibility. In other words, whether you want to use it for metal, plastic, rubber, or painted surfaces, the solvent will work fine.

This unique ability optimizes its versatility, making it a staple addition to your toolbox. Also, this liquid will not harden, stick together, or expire like a few of the options out there.

This property renders it a nice purchase for those occasional uses that don’t occur very often. The spout ensures precision in the application so that you benefit from every drop that comes out.

Reasons To Buy:

  • It works with different surfaces.
  • It does not affect paint.
  • It will not gum.
  • It does not expire.

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Frequently Asked Questions (FAQS)

What is the top-rated penetrating oil on the market?

Although we have many counterfeit penetrating oils in the market, we still have a few that you can turn to for help. Among these options are those covered in this review.

Is wd40 a good penetrating oil?

Yes. In fact, it boasts the best versatility on the list. It also has several convenience features as seen in the straw. Hence, you can consider giving it a shot if that is what you were thinking.

Is PB Blaster better than wd40?

It depends on what angle you are comparing the two. In versatility, they are all multi-purpose oils although WD40 offers the best. Also, WD40 works better for cleaning purposes. However, for rust removal, PB Blaster outshines the WD40 oil although they all deliver impressive performance.

What do I consider when buying penetrating oil?

When buying penetrating oil, consider factors such as versatility, viscosity, price, and convenience features such as precision tips.

How long does penetrating oil take to work?

The period they take to deliver results will differ depending on the formula used. Some will penetrate in seconds and work in no time while others may take up to 15 minutes to provide results.


Provided that you find yourself tightening or loosening fasteners, penetrating oil is something that will save you time and effort when you come across stuck joints.

And with so many fake solvents out there, we have suggested for you some of the reliable options that will give you value for your money.

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Last update on 2023-09-30 / Affiliate links / Images from Amazon Product Advertising API

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