Does Salt Kill Spiders?

Salt will not immediately kill spiders but can be used as a repellent.

Salt is harmful to spiders and spraying some saltwater onto a spider or their nest is a good way of discouraging it from being in your home. However, the spider will not die immediately.

To deter a spider with salt, you’ll want to create a mixture of salt and water. For this, you’ll need to dissolve an ounce of salt into a gallon of water, and then fill the mixture into a spray bottle. After that, you’ll want to use the spray bottle and spray the mixture onto the spider or the spider nest. It can act well both as a repellent and as a form of pest control.

Does Salt Kill Spiders

Important Note: This is general information for entertainment purposes only. If you have been bitten, seek professional medical attention immediately. Always have professionals identify and manage your pest control needs.

Can I Use Salt to Kill Spiders?

Salt can be an effective solution for removing spiders from your home and from preventing new spiders from entering.

Your first reaction when you see a spider might be to look for a can of insecticide – but that may not be the best solution for your health. Insecticides are highly toxic, especially if used commonly around your home. They’re harmful to your kidneys, respiratory system, and might even cause cancer in the long term.

These downsides mean that many people tend to prefer natural treatments for insects and spiders in their homes. The good thing here is that there are many viable alternatives available, especially if you’re willing to try new things out and if you have supplies ready to go around your home.

One of the most widely recommended strategies for removing spiders or killing them is by using salt and mixing it with water. Then, as the mixture settles, you’ll want to spray it onto the spider or the spider’s nest to kill it.

Sounds simple enough, but does it work?

We know that drinking salt water is not a great idea, because an excess intake of salt is harmful even to humans. The same can be said for the majority of animals, including spiders. 

When you spray salt onto a spider, the salt will affect the spider, and eventually kill it off with time. But salt is perhaps an even more effective repellent than it is a solution to kill the spider, because of its toxic properties. If you really want to prevent spiders from entering your home, spray some salt where they commonly enter.

Will Salt Keep Spiders Away?

Salt is a slowly acting toxin that can harm spiders, so it is a very effective solution for preventing spiders from entering your home in the first place.

Preventing the spiders (or other insects) from entering your home is the most effective pest control solution and one that you should stick to if you don’t want to have any problems with spiders or insects in the long run.

To use salt as a repellent, follow these steps:

  1. To create a large-scale solution, the best way is to use a gallon of water
  2. Place about an ounce of salt (⅛ cup) into the gallon of water
  3. Shake the solution well so it mixes
  4. Pour the solution into a spray bottle
  5. Spray the mixture onto areas where insects or spiders commonly enter your home or where they are nesting

You’ll see that this is potentially a good solution for areas where you don’t want the spiders or insects to enter.

The main downside of this method is that salt will leave traces all over the area you spray it on, so it might not be the best solution if you don’t want to affect the look of a surface or area.

Also, make note that spraying this solution onto plants is harmful to the plants and will kill them off, so make sure you don’t spray it onto flowers or other plants you have around your home or house. If you spray it onto plants, their leaves will start to turn brown and the plant will start dying quickly.

Can I Use Just Salt for Removing Spiders?

Using just salt will likely not kill a spider immediately, although it might also be an effective solution for repelling animals and preventing them from entering your home.

Usually, we’d recommend creating a saltwater mixture as described above (1 ounce of salt per gallon of water). This solution can be highly effective both as an insecticide and a repellent, as it has the potential to both kill the spider (slowly) and prevent it from coming close to you.

Salt on its own, however, will not kill the spider if you sprinkle it over the spider. At best, using just salt is a repellent, but even in this case, it might not be the best solution.

Salt is abrasive, which means that sprinkling salt on certain surfaces of your home might cause damage to the materials of your home. You might want to be careful when using salt on surfaces like carpet, wood, or ceramic surfaces.

Can Salt Kill Other Pests?

Yes, salt has been used for quite some time for killing pests, such as insects or other unwarranted animals.

In fact, salt was one of the earliest solutions of pest control, because it was widely available and also highly effective for keeping out bugs and insects. In addition, it was commonly used in gardens, especially those that were prone to having many harmful pests and insects that could harm the crops.

So you can use the saltwater solution or even salt itself for removing other bugs from your home, as well as insects. It’s one of the more natural means of pest control that many people still use, despite it being a centuries-old remedy.\

Related Articles:


Using salt for killing spiders or keeping them at bay can be an effective solution, provided that you mix it with water and create the right amount of solution for controlling pests and spiders.

Salt is toxic to plants and animals, especially in higher quantities, so it can lead to organ failure in spiders, which is an effective way of controlling spider populations in homes.

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