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Will Boiling Water Damage Car Paint?

by Peter Morris
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This article delves into the effects of boiling water on car paint, exploring the science behind it, and offering alternative methods for car maintenance.

Boiling Water Damage on Car Paint

Boiling Water Damage on Car Paint

Does Boiling Hot Water Damage Car Paint?

The paint of an automobile might absolutely be harmed by hot, boiling water. When an excessive amount of boiling hot water is thrown onto the external body of the vehicle, the wax layer, the protective coating of the paint, may be negatively impacted. This is especially true if too much pressure is used to pour the hot water, which can result in scratches and other types of damage.

Boiling water damages the car's paint

Boiling water damages the car’s paint

Due to the possible harm that boiling hot water may do, your vehicle’s maintenance costs may rise. It’s important to keep in mind that while boiling water might be beneficial if used properly, it can also be harmful if used inappropriately in other cases, such as eliminating small dents.

What Effect Does Boiling Hot Water Have on Your Car’s Paint?

Let’s discuss a few effects of putting boiling hot water on automobile paint.

Removes dirt

Cold water is less effective in cleaning off dirt than hot water. This is the reason why automobile owners choose to clean their vehicles in warmer water. To remove all types of grease and filth from your car, consider washing it with hot, boiling water.

Boiling Water on Car Paint

Boiling Water on Car Paint

Cold water is better at removing oil and debris from surfaces by creating chemical reactions than boiling hot water.

Removes dent

Sometimes, dents on cars are removed with hot water. Boiling hot water’s reactive strength helps the automobile come back to form by eliminating dents. Particularly helpful on little dents is boiling hot water.

Breaks wax layer

Your car’s paint can occasionally be harmed by hot water. The wax layer of your automobile paint might be broken if boiling hot water is thrown on it with a lot of pressure, which can ultimately damage the paintwork.

It takes extreme caution to pour boiling water onto car paint since it is a tough task.

Also Read: Damage Car Paint: 25 Common Causes You Need to Avoid

Leaving scratches

If applied recklessly, boiling water that has just boiled might damage your car. When removing dirt from a car’s body, some individuals use hot water. However, if you use too much boiling hot water, it can create scratches on the paint of your car rather cleaning clearing it of debris.

Also Read: Mysterious Scratches on Car:16 reasons and how to repair

Boiling water damages the car's paint

Boiling water damages the car’s paint

Can I Pour Boiling Hot Water on Other Areas of My Car?

Even though you may pour hot water over your car, not every area of it should be covered. For instance, the windshield of your car might not withstand the powerful chemical reaction caused by boiling water. The heat can cause the glass to crack, leading to costly repairs.

Also Read: Stress Cracks in Car Paint: 5 Causes and How to Avoid Them

Therefore, it’s essential to use hot water purposefully on your car. Your car’s paint and other parts might be seriously harmed if you carelessly pour boiling hot water on them without any special reason.

Can Boiling Water Remove Dents from Cars?

We are aware that dents in cars may be removed with hot, boiled water. However, let’s now discuss the kind of dents it can or cannot remove off the body of your vehicle.

Minor dents

By pouring boiling hot water over minor dents on your automobile, you may eliminate them quickly and effectively. Hot water is a simple and affordable method for removing small dents. The little dings on your automobile may simply be repaired by carefully pouring a cooking pan full of water on them.

You may simply pop or pump the little dents out after pouring the scalding hot water.

Big dents

The big dents in your automobile won’t come out as easily with boiling hot water. With hot water, you may pop or pump the large dents out. But it will also have several scratches and seem out of shape.

big dent on car

big dent on car

Massive dents on your automobile cannot be repaired with a single pour of boiling hot water. If you see large dents on your automobile, you can use alternative ways in lieu of splashing hot water on them.

Many Still Use Cold Water for Washing Their Cars

Despite the advantages of warm water, many individuals nonetheless choose to use cold water to wash their cars. This is often due to the belief that cold water is less likely to damage the car paint due to low temperature. However, as we’ve discussed, warm water is often the better choice as it’s more effective at cleaning and less likely to cause damage.

Warm Water Is Ideal for Washing Cars

In the realm of car detailing, warm water reigns supreme. The best water temperature for washing cars is warm because it is safe for the accessories, car paint and protectants while yet being heated enough to quickly remove dirt from the vehicle. Anywhere between 100 and 130 degrees Fahrenheit is the best water temperature for washing autos.

No more than 140 degrees Fahrenheit should be present in the water. Warm water is a standard feature in all self-service vehicle washing places and for good reason. When used in conjunction with high-pressure washers, it simply removes the dirt from the vehicle more effectively.

Warm water might be a nice addition to speed up your auto-cleaning activities, but it’s not necessary while washing cars. Installing a specialized boiler for washing your vehicle at your auto detailing shop may get pricey. There is, in my opinion, no need to purchase boilers if you are not a skilled detailer.

Warm Water Can Be Used Inside Car Wash Buckets

Using warm water in your buckets for car washing is one approach to profit from its qualities. This enables you to efficiently clean your automobile without running the danger of causing the paint to crack from hot water.

Simply fill your buckets with warm water and add your car wash soap as usual. Then, use a soft sponge or microfiber cloth to wash your vehicle, rinsing frequently to remove dirt and soap.


In conclusion, while using boiling hot water to remove small dents might be useful in some circumstances, doing so carelessly can harm your car’s paint. When washing your car, warm water is frequently the ideal option because it is excellent at cleaning yet less prone to harm the paint.

Always remember to use the proper equipment and methods to maintain your car’s appearance and repair it. A little information and consideration may go a long way when washing, fixing dents, or touching up paint on your automobile.

Frequently Asked Questions

Can boiling hot water damage car paint?

Yes, if handled carelessly, boiling hot water can harm automobile paint. The paint may become fragile if the wax coating that protects it is removed.

Can I use boiling hot water to remove dents from my car?

Using hot water, you might perhaps erase minor dents from your automobile. It is inefficient for large dents and should only be applied sparingly to avoid causing more damage.

Should I wash my automobile with hot water?

While hot water might be useful for cleaning dirt and grime, it shouldn’t be used on your automobile since it could damage the paint or cause the metal parts to expand. As a result, washing your automobile is frequently best done with warm water.

What are some alternatives to using hot water to remove dents from my car?

To fix dents in your automobile, try using a plunger, a hairdryer, hot glue, or dry ice as alternatives to hot water. To get the best outcomes, each of these procedures has a specific set of instructions and safety measures to follow.

What impact does hot water have on car paint?

When you use hot water on the paint of your automobile, there might be both immediate and long-term effects. Hot water may directly strip the wax covering from your car’s paint, leaving it bare and susceptible to damage. Indirectly, the heat from the water may cause the metal components of your car to expand, which may result in part misalignment or, if the metal expands too much, cracks in the paint.

Why do the majority of people still wash their cars with cold water?

Many people prefer using cold water to wash their automobiles despite the benefits of warm water. This occurs frequently because people mistakenly think that using cold water won’t harm their car’s paint. But as we’ve shown, warm water is frequently a preferable option because it cleans better and is less prone to harm things.

Can I fill my car wash buckets with warm water?

It is OK to add warm water to your buckets before washing your car. You may effectively clean your automobile with this technique with minimal risk of the hot water damaging the paint. Simply fill your buckets with warm water and add your car wash soap as usual. Then, use a soft sponge or microfiber cloth to wash your vehicle, rinsing frequently to remove dirt and soap.

Can heat damage paint on a car?

Your car’s bodywork might deteriorate if it is left in the sun for a lengthy period of time. Your paintwork may experience cracking or fading as a result of extended heat exposure.

How hot is too hot to wash your car?

There are limits, therefore keep in mind that you shouldn’t allow the temperature to get over 140 to 150 degrees Fahrenheit to avoid chemical spillover or equipment/vehicle damage.

Does steam damage car paint?

Hot steam breaks down dirt and dust without the need for harsh chemicals that could damage the paint.

How should car paint be washed safely?

Washing your automobile by hand is the safest method. Employing a stiff bristle brush on your car’s paint might cause swirl marks or scratches since some brushes are quite abrasive. To clean your automobile at home, you may make use of hoses, towels and even power washers. Using a lot of soap, water, and a soft mitt is the finest approach to hand washing your automobile.

Can hot water be used to defrost a car?

Never use hot or warm water to defrost your windscreen since doing so increases the risk of the glass breaking. Pouring cold water is additionally a terrible idea since it might cause the glass of the windshield to freeze and worsen the situation. With a scraper and brush, you may start to remove the ice after it has begun to melt.

Can I put boiled water in my car radiator?

Engine running temperatures vary from model to model, however, it is not uncommon for an engine to operate at or over 100°C, which also happens to be the boiling point of the water in your cooling system. You will experience a wide range of issues if you boil water in your cooling system.

Will hot water remove corrosion?

If the battery connections appear to be rusted, carefully pour some hot water over the terminals; this should remove the corrosion. You obviously need to be careful when doing this, so don’t move too quickly and use gloves. Water is required in very small amounts.

Does boiling water cause more rust to form?

At normal temperatures, rust requires both water and oxygen to form. Because all dissolved gases, including oxygen, are removed when water is boiled. Since this water is oxygen-deficient, rust doesn’t truly happen.

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