Penetrating oils are originally designed to work their ways between bolts and nuts to provide the necessary lubricant to pry them apart. It’s also quite useful for protecting against rust, for removing adhesives and for about a million other applications. That’s why every homeowner should have a bottle of this lubricant for use around the home or in the garage. To outline the benefits of using these products, and to help our readers find the best penetrating oils available, we’ve researched the ten brands that are capable of doing the most good. Let’s take a closer look at each of these individual products and see how they stack up against one another.
Best Penetrating Oils – Reviews & Buying Guide
10Gasoila Free-All Rust Eater
Until we started researching penetrating oils, we hadn’t even heard of this product, so many of our readers can be forgiven if they haven’t heard of it either. However, even though we weren’t familiar with it, once we tried it we were impressed by how it worked. Although it did require several different applications for it to unstick frozen bolts or rusted screws, it did eventually unstick them with time. And it also did a great job of removing rust and loosening sticky adhesives. And because it doesn’t contain silicone by-products, it can easily be used in shop or painting environments.
- Provides excellent rust protection
- Doesn’t contain silicone by-products
- May have to be applied several times to actually work
9WD-40 Specialist Rust-Release Spray
Anyone who has had to deal with rusted or frozen bolts know just what a pain it can be to unstick them. They usually require a high-quality penetrating lubricant and a whole lot of elbow grease to unstick them. Fortunately, this product is capable of unsticking bolts that are hard to remove. Thanks to its smart straw, it can be sprayed exactly where it’s needed and gets the job done quite well. It also does a decent job of dealing with rust, although honestly, it’s not as effective for those projects a regular WD-40.
- It unsticks frozen screws
- Can remove rust with a bit of effort
- Not as effective as regular WD-40
8Liquid Wrench Penetrating Oil
If there’s one thing that can be said about this product is that it’s an extremely effective penetrating lubricant. It didn’t matter what we sprayed it on, it was capable of getting the job done. It was able to free nuts and bolts, and we even used it to unfreeze a lock that we thought was permanently broken. It’s also an American-made product and is safe to use on PVC and plastic parts. So why didn’t it get a higher rating? It didn’t rank higher because of its strong odor. Otherwise, it’s a great product.
- Can be used for a variety of different jobs
- Has a precision smart straw for easy application
- Has a very noxious odor to it
7B’Laster Powerful Penetrating Catalyst
Even though we felt like this product had a pretty bad smell to it, we still feel like it’s a great tool for anyone to use. It’s a product that’s been manufactured since the 1950s and is probably one of the cheapest penetrating lubricants on this list. And by the way, it also works quite well. It’s capable of really unsticking frozen bolts and rusted nuts and does it without the user having to use a lot of elbow grease. That makes it a product worth considering, as long as the person using it isn’t offended by strong smells.
- It’s very inexpensive
- Works extremely well
- Has a terrible smell to it
63-In-1 Multipurpose Oil
3-In-1 Multipurpose oil is penetrating oil that’s probably been used by your father, your grandfather and your great grandfather. That’s because this product has been manufactured since 1894, making it one of the first multipurpose oils that’s still around today. What does that say about this product? It says that generations of people have trusted their projects to this oil, and for good reason. It works quite well and is super easy-to-use, although we do have to say that its cap can sometimes be difficult to remove with one hand.
- Acts quickly & effectively
- Loosens stuck nuts and bolts quickly
- Cap is hard to handle during use
5Gibbs Brand Lubricant
Even though this penetrating lubricant is one of the more expensive ones available, it still delivers some pretty good value for the money. That’s because it penetrates deeply, helps to lubricate surfaces, and cleans at the same time. It’s a product that has uses in the garage or the home. It can be used to unfreeze stuck bolts, for maintaining guns, or for projects around the house. That’s probably why it’s used by everyone by a wide variety of people all around the world.
- It’s easy-to-use
- It provides great results
- It penetrates deeply
- Is a bit expensive
4Kano Aerokroil Penetrating Aerosol Oil
Even though this is one of the more expensive penetrating oils available, it’s also one of the hardest workings. Since it’s in aerosol form, it’s capable of penetrating spaces as small as one-millionth of an inch. That makes it the perfect solution for removing rusted or frozen bolts, or dissolving stuck-on gum, oil and dried grease. And since it displaces water, it also cleans and lubricated metal surfaces so that they don’t rust. This might not make it the cheapest solution for rusted metal, but it does make it one of the best.
- Cleans metal parts
- Loosens nut & bolts
- Works quickly
- It’s a bit expensive
3Kano Kroil Penetrating Oil
Since this penetrating oil doesn’t become hard over time and never gums it, it’s a product that can be kept in the workshop or garage until it’s needed. This product can be used to loosen stuck nuts and bolts and can be used on both painted and bare metal surfaces. It can also be used on rubber or plastic without harming them. This makes it a very versatile oil that can be used for several different jobs and one that’s always ready to get to work.
- This product never degrades
- Loosens stuck & fronzen screws
- Lubricates metal surfaces
- It’s a bit expensive
2Seafoam Extreme Marine & RV Lubricant
This lubricant and cleaner from Seafoam is a product that’s designed to be one of the fastest-acting penetrating oils available. It’s designed to be wicked into extremely tight spaces and to loosen stuck and rusted bolts with ease. It’s a low-odor formula that works quite well and even gets rid of rust as it’s applied. This makes it quite useful for several different jobs including cleaning and lubricating air tools or hinges, throttle plates, or guns.
- Lubricates & cleans metal surfaces
- Removes rust
- Is a low-odor product
- Is extremely fast acting
- It’s a bit more viscous than other lubricating oils
1WD-40 Multi-Use Lubricating Oil
WD-40 is a classic for a reason and that reason is that it’s one of the best performing penetrating oils available. This stuff gets down into the smallest of openings and goes right to work removing rust and removing moisture. It’s great from unsticking mechanisms that have frozen, or nuts and bolts that are rusted tight. It can also be used on a variety of hinges and moving parts to keep them in good working order. And because it can dissolve gum, glue and other sticky residues, it can be used to remove adhesives.
- Lubricates & removes rust
- Loosens stuck & frozen bolts
- Removes gum & adhesives
- Stop squeaks
- Doesn’t smell very good