Does Paint Thinner Evaporate?

You left a can of paint thinner open for a few days and noticed that the volume seems to have decreased. You checked for leaks but found none. Since a paint thinner gives off strong fumes, you might wonder if a paint thinner evaporates. We’ve researched this topic to give you the details!

Paint thinner is volatile, which means that it is easily converted into a gas and therefore has a high vapor pressure. The key to understanding why paint thinner evaporates more easily is because of the vapor pressure. The vapor pressure is how much the molecules in a liquid want to escape as a gas.

You must store a paint thinner under a certain condition to keep the vapor pressure low enough so that it does not evaporate too quickly. Keep reading to learn more about the proper storage conditions of paint thinners so you can maximize their shelf life.

How To Properly Store Paint Thinners

Proper storage of paint thinners can help prevent contamination of your environment. You shouldn't store thinning solvents near other flammables, such as cleaning products or heating systems. Never place a container of paint thinner in direct sunlight, as this can cause the solvent to evaporate rapidly. 

Startex brand of Green Paint Thinner and Acetone in stainless steel 1 gallon containers

Ideally, you should not store paint thinners in steel, aluminum, or glass containers. You can use any container aside from the previously mentioned to store your thinner, but make sure it is properly covered and that it has a tight-fitting lid. 

If you use a plastic container, make sure it is approved by the Occupational Safety and Health Administration for use in containing volatile substances. Alternatively, you can reuse the same plastic container that came with it when you bought it. As long as the lid is tight-fitting, you're all good. Keep it upright so that the thinning solvents don't leak.

And finally, the most important thing is that you make sure that the temperature is at a safe level for storage. You must keep paint thinners in a cool, dark place away from any heat sources because they're volatile.

Some paint thinners, like xylene, have flash points at room temperature, so it's best to keep this type of thinner at a temperature that is lower than room temperature. A flash point is the lowest temperature at which a volatile substance can ignite or explode violently with the slightest spark.

Are Mineral Spirits and Paint Thinners the Same?

There is a thin line that separates the two. Mineral spirits are technically paint thinners, and they are used interchangeably with the term "paint thinner" in many cases. When we say mineral spirits, it only highlights the chemical makeup of the solvent.

The term "paint thinner" is a term that is generally used to describe a variety of different types of products that can reduce or thin a paint's viscosity and this includes mineral spirits. 

In most cases, mineral spirits are generally labeled as paint thinners and this can create confusion especially if you're looking for a paint-thinning product with a different chemical composition that is specifically designed to thin paint. Always read the label on the container.

What Containers Can I Use to Store Mineral Spirits?

When working with mineral spirits, you want to make sure that you're using the right kind of container. When you are, you can be sure that you are keeping this chemical away safely from yourself and your family. 

Mineral spirits should only be stored in plunger cans and safety cans and only be filled to the minimum amount needed. Never fill your bottle past the top.

Mineral spirits are extremely flammable and can cause serious damage if not stored properly. You don't want to store your mineral spirits in an area with heat or open flames. Make sure to keep them away from heat sources and direct sunlight. 

How Quickly Does a Paint Thinner Evaporate?

Paint thinner evaporates more quickly when it is exposed to higher temperatures. This is because high temperatures break down the chemical bonds in paint thinner into its constituent parts as vapor.

The rate of evaporation also depends on how dispersed the paint thinner is. If the paint thinner is more evenly distributed throughout the surface, meaning it covers a wide area like when it's spilled, then it will evaporate more quickly than if it was left in an open container, which could take a few days.

Are Paint Thinner Fumes Dangerous?

Klean strip paint thinner on display in a home depot store

Paint thinner is considered a health risk because it has high volatility and a strong, distinct odor. It is considered a dangerous inhalant due to its toxic properties.

As with any other solvent, paint thinner can be irritating to the skin and eyes. Your eyes and respiratory system are more vulnerable to paint thinner fumes because they are more permeable to chemical substances than the skin.

The fumes from paint thinners can cause headaches and dizziness at the onset. Prolonged exposure can cause serious damage to the major internal organs such us the lung, liver, kidney, and brain. It can also disrupt the reproductive system and may cause infertility.

You can help reduce the amount of paint thinner that gets into your body by wearing an N-95 or higher mask while working. If you use a respirator or wear an eye mask, you can minimize the amount of paint thinner that enters your body.

Even though the fumes are considered hazardous, they are still not hazardous enough to warrant a hazmat suit. The reason is that the amount of vapor exposure needed to cause harm is greater than what a person can withstand.

How to Neutralize Paint Thinner Smell


You can neutralize paint thinner fumes by proper ventilation. You can use a fan to move the fumes to another part of the work area where they can be diluted by the air. This may require opening up windows and doors to help the process. 

In addition, the smell of paint thinner can also be reduced by adding an odor absorbent such as baking soda on a pan or cookie sheet to the work area. Baking soda has been known to absorb odors and is a popular household remedy.

Alternatively, you can also use some activated charcoal. An activated charcoal is a great odor absorber and also neutralizes the fumes that are released when the solvent evaporates. 

Can Air Purifiers Help Remove Paint Thinner Fumes?

Indoor air purifier in the room

Air purifiers are a great way to help rid your home of unpleasant smells. However, not all air purifiers are created equal. Some are designed to filter out allergens while others are designed to remove odors from the air.

When choosing the right air purifier to neutralize paint odors, make sure it has an activated carbon filter. High-quality air purifiers have activated carbon filters and they can remove most of the chemical compounds that are released when you use paint thinners.

They are perfect in rooms where paints and thinners are used, especially in areas where there is poor ventilation to push the fumes out.

Check out this air purifier with an activated carbon filter on Amazon.

Is An Odorless Paint Thinner Safe or Still Toxic?

Can with a thinner from the upside view

Odorless paint thinners are often considered safer than the regular varieties, but there are some concerns about these types of products. It may sound logical to assume that a product without odor would be less toxic, but this is not necessarily true.

In fact, science has found no conclusive proof that odorless paint thinner does not have any negative health effects. Odorless paint thinners may be odorless, but they still emit fumes that are too subtle to be detected by the olfactory system.

You should take proper precautions as the chemical compounds emitted by odorless paint thinner can still be absorbed through the skin and into the body. 

Is There a Safe and Non-Toxic Paint Thinner?

Gamsol is a petroleum distillate, which means it is extracted from natural gas. This is the same stuff that powers your furnace and your stove.

When it comes to thinning oil paints, they have to be mixed with a diluent to decrease their viscosity. Turpentine, the leading thinning agent, has been used for decades to thin oils.

However, turpentine has negative effects on the environment. Because of its highly volatile and toxic properties, it can cause the contamination and disruption of aquatic ecosystems and wildlife.

Gamsol is the ideal alternative to turpentine. It is still flammable though but it's non-toxic compared to turpentine.

Check out Gamsol on Amazon.

Can I Sleep in a Room That Has Just Been Painted?

Room with newly painted blue walls

Harmful fumes can  cause problems when you're trying to relax. You'll find these fumes in some paints, varnishes, lacquers, and solvents. They can cause headaches, difficulty breathing, and can even be fatal if inhaled over a long period of time.

As the paint transitions from liquid to solid, it will begin to change its chemical composition. During this transition period, toxic chemicals are being released, so trying to sleep in a room that has just been painted or varnished will make you feel ill. 

Allow two weeks for the fumes to clear before you attempt to sleep there. If you're concerned about your health, consider finding a different room to sleep. It's better to find a new place than to suffer through it. 

In Closing

Paint thinner is highly volatile and will evaporate quickly. In most cases, the fumes that result from the evaporation of paint thinner are quite tolerable and pose no health risk to anyone, unless one is exposed to very high levels for an extended period of time. 

Paint thinner is flammable and can ignite easily. Therefore, it is important that you always make sure that the temperature of the room in which you work is cool. Sometimes, even room temperature is not good for certain types of paint thinners.

Always wear protective gear when working with paint thinner and other volatile compounds. Also, make sure that you have an adequate ventilation system, such as a fan, running while working with these substances.

You might also like:

7 Paint Thinner Types And Brands [And What They're Good For]

How To Clean Paint Brushes With Paint Thinner

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