Many gardeners and homeowners enjoy researching strategies to combat wasps in their yards. There are several commercial wasp-killing solutions available, many of which may be stored in your kitchen cupboards. So here’s an example: does WD40 kill wasps?

Wasps are killed by WD40. WD40 may also be used to keep wasps from nesting.

There are several commercial products available that are designed to kill wasps. Although it does not say “wasp killer” on the can, many people swear by it for killing wasps.

When using WD40, wear protective clothing because it is highly potent and can hurt exposed flesh.

Does WD40 Kill Wasps? Why? 

The fluid WD40 is used to protect the metal from rust. This liquid acts by entering and lubricating the metal. WD40 is also used to clean surfaces of oil and dirt.

So does WD40 kill wasps? How come WD40 can kill wasps? Spiracles are tiny apertures on the body of all insects, including wasps. These apertures allow the insects to breathe by taking oxygen and exchanging it for CO2.

WD40 comes in handy here. As it penetrates and plugs the spiracles, this liquid kills wasps. As a result, no air flows through. WD40 has been designed to target tiny holes especially.

When WD40 comes into contact with the heated temperature of the wasp, it will also froth. This suffocates the wasps’ lungs and causes them to die.

The wasp will die of poison even if it does not choke. Once inside the body, WD40 is harmful. In rare situations, the poison might be more lethal to wasps than asphyxia.

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How To Kill Wasps Using WD40

You will not be able to eliminate them until you attack the nests because wasps are territorial. To successfully kill wasps using WD40, you must do the following steps:

  • Cleaning out any evidence of previous nests is highly recommended. Wasps like to return to the same breeding sites after their hibernating process. It would be beneficial to dispose of any old wasp nests that you may locate in your home.
  • Following that, spray the same area with WD40. You must be diligent in your application to prevent leaving wasps behind. It would help if you also sprayed gutters and any cracks where wasps may make nests.
  • You might find some active wasp nests in your yard. Use WD40 to get rid of any active nests. The evening is the optimum time to accomplish this. Wasps do not move swiftly when the weather is chilly. It would be advantageous to thoroughly submerge the wasp nest so that the fluid reaches every wasp.
  • After soaking the wasp nest, you must wait an hour to guarantee that all the wasps have died. When you are confident that the wasp nest is no longer active, use a long instrument like a broom to knock it down. The nest must be removed by discarding it after covering it with a plastic bag.

What Are Some Safety Measures To Take When Using WD40?

Because WD40 is a potent chemical, you should exercise caution when using it to repel wasps.

  • The first step is to put on protective clothes. This will also protect you from wasp stings.
  • Protecting your skin is crucial here. You must also protect your eyes. It’s also highly recommended to wear safety eyewear.

Why Are Wasps Chasing You?

Wasps will not attack you unless you provoke them to do so. While stinging, a chemical odour is helping them to mark their target, making it easy for other wasps to find you. They will chase you if you run and are quicker than you. Unless you have destroyed any nests, Yellowjackets wasps or paper wasps will not follow you for a very far distance.

Do Wasps Return After The Nest Is Destroyed?

Do wasps reappear when a nest is destroyed? When wasps return, they generally only stay for a few hours around their old location of the nest before realizing their nest is destroyed. They will not usually construct their nest in the same place.

Why Do Wasps Keep Returning To My House?

Wasps are drawn to the odours of your house. Wasps are naturally inquisitive insects drawn to various fragrances from your home. They also require a lot of water and can smell it when it evaporates into the air. As a result, a pool or birdbath installed near your home is a perfect opportunity for the wasps to be attracted.

Is There A Spray That Will Keep Wasps Away From My Home?

Although not a natural cure, the ubiquitous home lubricant spray known as WD-40 repels wasps owing to its stench; spray your home’s eaves and overhangs with the extended nozzle that comes with a new can. Repeat many times throughout the season to maintain your house nest-free.

How Long Does WD-40 Take To Kill Wasps?

WD-40 may also be used to exterminate a live wasp nest. Err on the side of caution and heavily spray the nest. You want to bathe the whole nest. Wait at least an hour to guarantee that all the wasps have perished before knocking down and disposing of the nest.

Will WD-40 Kill Bugs?

It’s a water displacement spray, lubricant oil, insect repellent and exterminator. It certainly is! You can quickly kill a roach by spraying it with WD-40! You may spray it on frames, windowsills, doors, and screens to prevent attracting wasps.

At What Time Of Day Are Wasps Most Active?

Wasps are often busier during the daytime. They become less active at night and around sunset. So, when it’s daytime and the workers are out and about, you’re more likely to be attacked by a swarm of wasps that regard you as a possible danger.


Many commercially marketed wasp repellents are effective. WD40, a lubricant, is an unusual approach to killing wasps. So, does WD40 kill wasps? Yes, this fluid is deadly to wasps because it causes death by suffocation.

Using this fluid, sweep away any old wasp nests utilizing a broom. The spray may then be used in cracks and crevices, where wasps may make their nests. If you already have a wasp nest, drench it with WD40. You must wait an hour for all the wasps to perish.

Because this is a risky process, it is critical to wear protective gear and seek assistance from a buddy.

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Dasun Thomas is a home solution expert with a passion for finding practical and innovative ways to improve living spaces. With a background in interior design and home renovation, Dasun has honed her skills in creating functional and beautiful homes. Through her articles, he shares his expertise on home organization, decluttering, DIY projects, and efficient space utilization. Dasun's goal is to inspire readers to transform their houses into inviting, organized, and stress-free homes.

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