TERRO® Ant Killer Spray

Model #: T401-6

Best used for:

  • Kills ants, spiders, cockroaches, crickets, Asian lady beetles & other insects
  • Kills on contact & continues to kill up to 6 weeks
  • Use as a spot or crack-and-crevice application
  • For indoor or outdoor use
  • Buy More, Save More - discounted price per each

Buy 2+   $4.74  5% off
Buy 6+   $4.49  10% off
Buy 12+   $4.24  15% off
Buy 24+   $3.99  20% off

Availability : In stock

Cannot Ship To : AK, HI, PR

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Product Description:

Arm yourself against ants and other unwanted insects with this convenient, 16 oz aerosol spray. With dual protection, TERRO® Ant Killer Spray provides fast killing action and keeps on killing for up to 6 weeks.

Indoor Use

Apply TERRO® Ant Killer Spray as a general surface, spot, or crack and crevice treatment to all non-food areas where ants and other pests crawl and hide. Stopping insects before they enter is key, so pay extra attention to potential entry points!

To control ants: Spray on trails, nests and points of entry. Use TERRO® Ant Killer Spray directly on ants when possible and repeat treatment if re-infestation occurs.

To control cockroaches, silverfish, crickets, scorpions, spiders, and Asian lady beetles: Spray into hiding places such as cracks and crevices, behind sinks, cabinets, along baseboards and floors, around drains and plumbing, hitting insects with spray whenever possible. Repeat treatment if re-infestation occurs.

Outdoor Use

Use TERRO® Ant Killer Spray to control ants, crawling insects, cockroaches, crickets and spiders. When spraying, point the spray nozzle away from your face, holding the can on a slight downward angle. For best results, spray when the air is calm. Spray ants directly where possible.


Product Features

  • Kills ants on contact and provides long-lasting residual control up to 6 weeks
  • Protects against cockroaches, silverfish, crickets, scorpions, spiders, centipedes and multicolored Asian lady beetles
  • Can be used indoors or outdoors
  • Convenient, easy-to-use aerosol spray bottle

    What’s in the Box

  • One 16 oz aerosol spray can


  • Contains Prallethrin [(RS)-2-Methyl-4-oxo-3-(2-propynyl) cyclopent-2-enyl (1RS)-cis, trans-chrysanthemate] (0.03%), Esfenvalerate [(S)-Cyano (3-phenoxyphenyl) methyl 4-chloro-alpha-(1-methylethyl) benzeneacetate] (0.05%), N-Octyl bicycloheptene dicarboximide (0.30%) and other ingredients (99.62%)
  • 16 oz aerosol spray can
  • For indoor and outdoor use
  • Reviews

    Disclaimer: Terro.com does not endorse any information contained in product reviews. Please follow all label instructions for your specific use.

    TERRO® Ant Killer Spray is rated 5.0 out of 5 by 15.
    Rated 4 out of 5 by from Terro evaluation I rated the Terro good because it works so well, at least I think it does. The container that we received had no instructions on what we should do to make it work, by detaching the the blue tab. Had to phone in for instructions as to what to do. Should make it easier to understand.
    Date published: 2016-10-08
    Rated 5 out of 5 by from excellent product I always recommend this to any one having an ant problem. It is the best product out there.
    Date published: 2016-09-19
    Rated 5 out of 5 by from This spray is no joke. I sprayed all the floors in my house with this spray. The next day, almost all the ants were gone. The few ants left are on their way to death. If you follow one of the ants around after he's walked on the sprayed areas, you'll see him die in front of you within 5 minutes. This is after the spray has dried, of course. If they walk on the stuff when it's still wet, they die on contact. I had a really bad ant problem that was making me livid everyday. 5 days after I used this spray, I haven't seen one ant.
    Date published: 2016-08-21
    Rated 5 out of 5 by from This spray is the best on the market I have used this spray to control the pavement ants that come in thru the cracks indoors and it works everytime. One time I had a big oribweaver spider in my window behind the screen. I sprayed it with one squirt and it kicked 3 times then fell to the bottom of the window. It was dead instantly. I also found a ant colony outdoors under my trash can and I just sprayed a light mist over them and they all died once again instantly. This spray is amazing. The liquid bait work really well to but they take 2 to 3 weeks to get rid of the colony. But once there gone they don't come back. Thank you for making something that really works.
    Date published: 2016-07-29
    Rated 5 out of 5 by from great stuff I don't normally use sprays because they never seem to be as effective as the liquid bait, but we found this to be very impressive. With one spray it took care of all the little guys the were visiting my pantry. The only thing I would change is the spray pattern, as it sort of goes out in a circle and kind of gets on everything. If you had an option for a more narrow stream in tight quarters that would be very effective.
    Date published: 2015-07-31
    Rated 5 out of 5 by from Best in Insect Killers! I ordered Terro Liquid Drops after my friend saw the ant invasion I was having in my master bedroom window. She couldn't remember the exact name of the drops but knew it began with the letter "T". I searched the internet and found Terro Liquid Ant Killer very quickly. Read their website and ordered it immediately. Within a few days I received my purchase and following the instructions I put a drop or two of the liquid on cardboard pieces and set them in my bedroom window. The next day all the ants were dead and I haven't seen any since. Greatest Product EVER!!!
    Date published: 2015-06-18
    Rated 5 out of 5 by from Amazon Review I purchased this after checking with my vet about a safe-to-use-around-cats solution to my ant problem. I live in an area that is plagued by ants, usually a couple of times a year. I usually use the Terro PreFilled Liquid Ant Killer II Baits 6 Pack T300, also purchased on my vet's recommendation, and manage to get rid of them in a week or so. This year, I got most of 'em after 2 tries, but there were a few stragglers. I got impatient. Spritzed around the entry point where the ants seemed to originate. It killed the remaining ants, and I haven't seen a live one since (4 days ago). I didn't use much at all -- really, just a 1/2 second spritz twice -- and they're gone. No strong lingering smell, either. Remember, though, I started with the pre-filled liquid bait traps (2 left out for 1 week; then 2 more for another week), so I think I'd already decimated the colony before using the spray. At the moment, I'm ant-free. And I'm totally sold on the Terro line of ant control products. My cats and I are pleased. (My female cat has a special "chirp" for spiders and ants, different from her "OMG! there's a BIRD!" chirp, and always lets me know when they've made another appearance.)
    Date published: 2014-08-22
    Rated 5 out of 5 by from Amazon Review Just a heads up this stuff is for regular ants not carpenter ants. Throws out a nice spray stream to cover a large area, You can however get this stuff cheaper at your local hardware store.
    Date published: 2014-08-15
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    If I were to spray this in a hole on the wall suspected of nest, what if it did not kill off the colony as I had sealed the hole? will my wall be screwed?

    Asked by: Amazed234
    This spray is made to kill on contact and will not have any residual effect. Our TERRO® Liquid Ant Baits (Model #T300) however, are made to be taken back to the colony by the ants to kill them at the source. These can be purchased at the following link: http://www.terro.com/terro-liquid-ant-baits-2-pack. Please feel free to call us at 1-800-800-1819 x 458 with any additional questions.
    Answered by: Consumer Relations
    Date published: 2016-12-21

    Does this spray have a smell and if so what does it smell like and how long does it take for the smell to go away.

    Asked by: Jdee
    This spray does have a sweet smell. It should dissipate shortly after application.
    Answered by: Consumer Relations
    Date published: 2016-10-25

    Good morning, I have a dog and a young child. How long after using the spray is it safe for us to be back in the area that has been sprayed?

    Asked by: Beth M
    We recommend keeping children and pets out of the treated area until the spray has dried.
    Answered by: Consumer Relations
    Date published: 2016-07-16

    I want the spray that came with the straw u could put in the nozzle to spray small cracks and crevices! Please help!

    Asked by: njc1287
    We apologize, the spray bottle with the extender straw is no longer available.
    Answered by: Consumer Relations
    Date published: 2016-07-16

    I found two black widows and webs hiding between the front door and trap door of my home. I used this spray to kill them and then saturated the webs. Will this also kill the eggs within the web when sprayed directly? Or just the spiders themselves? 

    Asked by: blackwidowsscareme
    This product is a contact killer that will only kill spiders when directly sprayed. It has not been tested to kill the eggs.
    Answered by: Consumer Relations
    Date published: 2016-07-16

    Is this safe around pets?

    Asked by: Coolmom9
    This product can be used confidently around pets when used a directed. Do not allow pets to re-enter the area until the spray has dried.
    Answered by: Consumer Relations
    Date published: 2016-03-21

    I store my kayak outdoors and found ants had gotten into the cockpit even though it was tightly covered. it is stored upside down, what would be the best product to stop this? and would it harm the fibreglass?plastic?

    Asked by: wind_rose_2
    As the kayak will be coming in contact with an aquatic habitat, we cannot recommend using the spray. Our best option would be using the TERRO® Liquid Ant Baits. We also have other products available. Please feel free to contact our Consumer Relations Team at 1-800-800-1819 x458 for additional assistance.
    Answered by: Consumer Relations
    Date published: 2015-12-14

    I have an indoor cat. Can Terro Spray be used and not worry about it harming my cat?

    Asked by: Mark62
    When using this product, it should be allowed to dry fully prior to allowing pets back into the treated area.
    Answered by: Consumer Relations
    Date published: 2015-10-03
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    All About


    There are more than 10,000 known species of ants living throughout the world. Like other insects, they have six legs; each with three joints. Ants have large heads with compound eyes, elbowed antennae and powerful jaws. Ants are social insects that live in structured nest communities throughout the world. The species of ant determines whether they live underground, in mounds built at ground level, in wood structures or in plants or trees.

    More About Ants


    Why are ants always invading my kitchen, bathroom and laundry areas?

    Ants are attracted to food, water and shelter. Kitchens, bathrooms and laundry rooms provide at least two of these conditions, making it an ideal haven for ants to congregate.

    I need to knock out an ant invasion quickly – what do you recommend?

    We suggest using TERRO® Ant Killer Spray or TERRO® Outdoor Ant Spray - both products kill on contact and will continue killing for 6-12 weeks. And better yet, these sprays are also effective against cockroaches, spiders, crickets, scorpions and other unwanted insects.
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