Top 10 Best Penetrating Oils for Loosening Rusted Bolts

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Have you ever tried to remove a bolt from a car and had it refuse point blank to move even a millimetre due to rust or old age? If you have then you know how annoying this situation can be. Don’t despair, however, because these days there is a knight in shining armour in the form of penetrating oils that make removing jammed nuts, hinges or bolts effortless and safe.

Any mechanic will tell you that rust can be a difficult problem, and rusted parts can be difficult to remove and replace. Having a good-quality penetrating oil can save you time and effort and make the process of removing bolts, screws and nuts, a cinch.

But which one should you buy out of the many different ones on the market today? To help answer that question we present a handy top 10 list of the best penetrating oils on the market today to guide you in the right direction

1. Aerokroil aerosol

Our first pick is the Aerokroil aerosol, which many people claim to be the best penetrating oil ever made despite it being one of the pricier oils on the market. It’s easy to use aerosol and patented lubricating technology eases tension in all metal joints, reducing friction with ease by attacking rust but leaving the base metal beneath untouched.

2. Kano Sili Kroil Penetrating Oil

Kano Sili Kroil is another excellent choice for penetrating rust and loosening bolts and joints. It doesn’t work quite as well or as quickly as the Aerkroil above but what it does do extremely well is provide the metal with a water-resistant coating that prevents further corrosion down the line and it does this at a cheaper price to boot.

Another added advantage of the Kano Sili Kroil is that it comes with a straw making it easy to reach those tighter spaces some other oils struggle to reach.

3. Liquid Wrench L103 Penetrating Oil

Liquid Wrench is one of the best regarded penetrating oil brands in the world, and the L103 is easily their most well-known product.

As far as rust removal goes, the L103 has unmatched performance, and its patented formula has seen many improvements over the years resulting in the respected product it is today.

Whether you want to lubricate moving parts, free a rusted bolt, unfreeze a lock or get rid of the grease within a pipe or hose, the product can tackle it all.

4. B’laster 8-PB – Penetrating Catalyst

B’laster is another well-known penetrating oil product due to its cheap price point and high effectiveness.

A problem that’s commonly associated with penetrating oils is how they evaporate quickly, thus making them ineffective to lubricate surfaces long term. The B’laster 8-PB is different as it creates a non-evaporating film that remains on surfaces longer and provides a lubricant for moving parts.

5. Liquid Wrench L116 Penetrating Oil

The Liquid Wrench L116 is manufactured by a family-owned company that has more than 70 years experience in the lubrication field.

It’s powerful formula truly lives up to its name and no matter how tight the joint/bolt seems, Liquid Wrench will make light work of it.

6. Gasoila Free All Rust Eater

The Gasoila Free All spray is made with adaptability in mind. Whether it’s a hinge, bolt, fence, gate, or any other metal object, this rust removing penetrant will not only remove the rust, but free the object too.

On top of this, Gasoila Free All Rust Eater is incredibly good at getting rid of white and red lead, carbon, graphite, tar deposits and scale. On top of this it doesn’t contain silicones or other harsh chemicals, making it safer for the environment than some of its competitors.

7. Kano Kroil Penetrating Oil

Our second Kano product on the list is a real powerhouse. The patented formula features a mixture of chemicals that will lower the surface tension on every rusted or jammed metal item you throw at it whilst protecting the metal underneath.

Because of its incredibly low viscosity, this solvent is able to reach into the tightest of spaces, loosening and lubricating surfaces with ease.

8. Castle Thrust Penetrating Oil

The unique selling ping of Castle Thrust Penetrating Oil is it’s a unique ion activated formula that prevents it burning off making it highly effective on metal parts subject to high temperatures.

This foam based solvent sticks to metal with ease and penetrates even the smallest of gaps making it ideal for auto-mechanics.

9. WD-40

We come to probably the most famous brand on the list. WD-40 is one of the handiest multipurpose products ever made and its many applications, ranging from lubricating metal surfaces to removing rust, have seen it sell millions of cans all over the world.

The name WD40 stands for water displacement 40 and as it suggests it is a great product for displacing moisture and as a result attacking and protecting from rust.

This is another can that comes attached with a permanent straw and its unique two-way spray system allows it to be used upright and upside down allowing it to reach places other lubricants cannot reach.

10. 3-IN-ONE Multi-Purpose Oil

The 3-IN-ONE Multi-Purpose Oil is one of the oldest penetrating oil brands on the market and as a result has benefited from years of experience and tinkering by its manufacturer.

This multipurpose drip oil can be used by both DIYers and mechanics and has a wide range of functions, including lubricating, cleaning and protecting metal tools, and clearing and preventing rust.

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In Conclusion

As a DIYer, mechanic or tradesperson having a good penetrating oil is essential and we are sure that if you choose one from the list above you will be more happy with your choice.

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