Although almost all spiders are entirely harmless to humans, most people still don’t want to share their homes with creepy crawlers. Instead of smashing these critters with your hand or a napkin, spider spray presents a valuable alternative. All of the sprays discussed in this article also work against many different types of insects. You can reuse these sprays if you ever run into issues with ants, fleas, roaches, or other insects. These spider sprays kill North America’s deadly “big three” spiders: brown recluses, black widows, and hobo spiders.

Terro Spider Killer Aerosol Spray

Terro Spider Kill Aerosol Spray

  • Our Rating: 4.5/5

MDX Concepts Organic Spider Spray

MDX Concepts Magma Organic Home Pest Control Spray

  • Our Rating: 4.3/5

Demon Max Insecticide

Demon Max Insecticide

  • Our Rating: 4.7/5

Terro Spider Killer Aerosol Spray

Pros

  • An effective direct-contact killer 
  • Safe for indoor and outdoor use
  • Formulated to be most effective against spiders

Cons

  • Must be relatively close to spray (12 to 15 inches away is recommended)
  • Can only spray in a mist setting

Comments:​

Terro’s spider killer aerosol spray is a popular and practical choice as a spider spray. This product uses the active ingredients of Pyrethriits05%) and Deltamethrin (.,,,,02%), which have been proven effective against spiders. This product’s intended use is to kill spiders, not to repel them.

Terro’s spider spray is most effective with direct contact. However, spraying where spiders are most active in your home can achieve less reliable results. Spider sprays, in general, work best when sprayed directly on the spider. Spraying an area that spiders will walk over later provides inconsistent results with most sprays.

MDX Concepts Magma Organic Home Pest Control Spray

Pros

  • Made with natural, organic ingredients 
  • Safe to use around pets and children
  • Has both jet and mist spray settings, allowing for choice in the application method
  • Can be used inside and outside

Cons

  • Similar sprays can be made at home using essential oils
  • Only kills by direct contact

Comments:

Instead of being made with ingredients that could potentially be harmful to pets or children, this spider spray relies on natural and organic ingredients. Natural spider sprays rely on the power of essential oils to kill spiders. This spray uses peppermint oil, spearmint oil, and rosemary oil. Although these ingredients are non-toxic for humans, they’re still lethal for the spiders roaming your home.

Demon Max Insecticide

Pros

  • Powerful and shown to be effective on even the most difficult to kill spiders 
  • Made with proven, well-researched insecticide ingredients 
  • Covers and protects large outdoor areas
  • Can be diluted to your desired concentration

Cons

  • Only for outdoor use
  • Quite a strong chemical odor

Comments:

This insecticide has a scary enough name to combat the scary-looking critters in your home. Although this spray advertises itself to get rid of termites primarily, it can kill over thirty types of insects – including spiders. Demon Max Insecticide should only be used outside and has a strong, unpleasant smell. However, the effectiveness of the spray against spiders is unquestionable. 

This product contains a highly concentrated amount of the active ingredient Cypermethrin. Once an insect comes into contact with Cypermethrin, its nerve cells are affected, which leads to paralysis and death. To use Demon Max Insecticide, dilute 1.3 to 5.1 ounces of this spray for every gallon of water. We recommend this spray if you have a large outdoor area you want to cover, such as a shed, patio, or the exterior of your home. Demon Max Insecticide is also extremely useful as a crack and crevice or spot treatment.

You can check out our complete review and comparison of Demon Max Insecticide here

All three spider sprays present beneficial options to eliminate spiders in and around your home. The Terro Spider Killer Aerosol Spray and MDX Concepts Magma Organic Home Pest Control Spray are practical options that can be used indoors and outdoors. The Demon Max Insecticide is a more heavy-duty option which can be extremely useful for covering large outdoor areas. 

Be cautious when dealing with these sprays or potentially harmful pests. None of these sprays should be ingested by humans or pets.