How to Keep Gas tank from Rusting after Cleaning It? [5 Efficient Methods]

You’ve cleaned your gas tank and left it for a few moments to catch up with something. And voila! The rust is back. The last thing every vehicle owner wants to see in their engine is rust. Furthermore, it can be extremely frustrating as well. 

So, the big question arises how to keep the gas tank from rusting after cleaning it?

To keep the rust away, the first and foremost step is to neutralize the acid properly. Using tank sealers and fogging oil are great measures to prevent your tank from rusting after cleaning.

Nevertheless, these were just the overview of things you can do. Throughout this article, we’ve provided a step-by-step procedure for how to execute them. 

It’s time to get into the details and put them into action-

What Causes Rust in Gas Tanks?

Rust is one of the nightmares every vehicle owner doesn’t want to see in their engines. Every restoration usually seems an impossible feat whenever they see rust covering the entire vehicle. It’s also what depreciates the value of every vehicle. 

Let’s check out why rust forms-

Contact with moisture

The primary cause of rust in a gas tank is the moisture that penetrates and remains inside the tank.

In gas tanks, it is possible for water to penetrate them and create moisture inside due to extreme heat. As a result of the water accompanied by the heat, corrosion forms quickly forming rust on the metal.

In addition, it is possible for moisture to stay in the gas tank for a long period of time, eventually reacting with the metal and forming rust.

Acid Not Neutralized Properly

If you clean the tank with acid without neutralizing it appropriately, you’re doing it incorrectly. Acid’s strong reactivity means it can react with metal tanks, causing corrosion and eventual destruction.

5 Ways to Keep Gas Tank from Rusting After Cleaning

We got to know what causes rust in a tank. Now let’s get to know about 5 easy ways that will keep the rust away forever. 

These steps are quite effortless to follow and nowhere near as complicated as measuring horsepower without a dyno

 Firstly, we need to clean the gas tank and then follow these steps to prevent the rust-

Buy Tanks with Rust Proof Materials

Buy a tank with rust prevention materials like polyresin, fiberglass resin, or Vinylester. With the help of fuel tank rust treatment, you will be able to prevent rust in the first place.

Apply Paint Coating

The first thing that you can do how to keep the gas tank from rusting is by using paint! Applying gas tank coating to prevent rust such as Hammerite Direct to Rust Metal Paint to your gas tank will protect it against rust, moisture, and water.

 After applying corrosion-resistant paint, you will notice that the water will just slide down.

Use Tank Sealer

As soon as you remove the rust, you’ll need a Fuel tank sealer. It prevents moisture from entering and causing rust again. 

Here are some of our top picks for fuel tank sealers:

This sealant can seal pinholes and seams while being resistant to fuel additives, alcohols, and other chemicals. In short, it can withstand and protect your gas tank for a long time.

Use the Right Gasoline

Gasoline uses components like water or additives. When these are present in the gas tank, the gasoline can easily break down. As a result, clogging and rusting will likely occur. 

So it is highly essential to use the right gasoline. An option that is very popular in the market right now is Midwest Can. It has very few additives compared to other products in the market and prevents rust effectively.

Keep the Tank Full

During summertime,  liquid absorption is faster due to the heat and the dry air. During this time, you need to ensure that the tank is filled without leaving any space for air. 

It will support in the prevention of internal corrosion

Use Secondary Container

A bund (secondary containment) made of concrete or brick is very useful and necessary to prevent and hold spillages. It happens as a result of tank penetration.

It must be able to hold 110% of its contents, so if there’s a leak, it’s overfilled or water forms in the tank, the outer bund can fully contain it safely.

Clean the Tank 

You should know how to clean out a generator gas tank. You will need hand gloves to clean just like you needed while cleaning fuse box terminals. Doing this will help you prevent internal and external corrosion. 

The first thing that you should do is drain the gasoline inside. Then, dispose of it and clean the tank from the inside and then outside.


Does vinegar dissolve rust?

Yes, vinegar is effective at removing rust from gas tanks since it contains acetic acid. It is possible to do this by filling the gas tank with water and then draining it.

How long does it take for a gas tank to rust?

Gasoline has a shelf life of three to six months, while diesel will last up to a year before it degrades. Organic ethanol, however, may lose its combustibility within one to three months due to oxidation and evaporation.

Why do you put wd40 in your gas tank?

WD-40 is a lubricant that has a number of uses, including lubrication, cleaning, and rust prevention

Will a rusty gas tank ruin an engine?

Yes, a rusty gas tank can ruin an engine. Rust can flow into the fuel lines or injectors, causing the engine to run lean and hot. 


We hope we’ve been able to help you with how to keep the gas tank from rusting after cleaning it. You should not encounter rust anymore in your gas tank as long as you follow all of our suggestions. 

Make sure to limit water exposure to your gas tank. 

Thanks for staying with us all the way to the end.

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