TERRO® Ant Killer Spray

Model #: T401-6

24 reviews
0 5 4.4

  • 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
Cannot Ship To: AK, HI, PR

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.

    Most Recent Customer Reviews

    Review Rate
    Review posted on www.terro.com
    July 23, 2019
    DID THE JOB!!!!!!! By David

    It took a LITTLE more than I was expecting. BUT, once I got the hang of how much would be needed at each area I need to spray it DID THE JOB!!!!!!! I am MORE than happy with the results!!! Thank You for this product and its ability to DO the job!!!!! David.

    Review Rate
    Review posted on www.terro.com
    January 21, 2019
    When tiny ants come indoors, this is the product we always reach for. By Ken

    I am surprised some reviewers have not had success with Terro products. This is the spray we always reach for when those tiny Pharaoh ants (sometimes called Sugar ants), come inside our house. We use the spray whenever there's an invasion of them. Once in a while we get lucky and discover their nest. It kills them dead instantly. When we find just one or two of the tiny creatures we know they are "scouts" and we we will follow their route if possible, putting a few drops of the Terro liquid bait down along the way. The scouts will go back to the nest and alert the others, who will follow them to the bait. As many as a hundred ants will devour the bait and take it back to the nest to feed the queen and the larvae, quickly killing the entire colony. Ants are always on the move, so be sure to keep stocked with Terro just in case another colony moves in after several weeks.

    Review Rate
    Review posted on www.terro.com
    August 28, 2018
    Ant Spray aerosol really works By Rae

    This is the only product that works for me. I spray it and they do not return for weeks. I have usedany of the other Terro products, they work for others but not me.

    Review Rate
    Review posted on www.terro.com
    August 16, 2018
    Waiting to see if this works.... By peter

    I called in today to register my thoughts that there are no instructions on the can about what to do if you get some of the fluid on your skin or inhale the spray. I think these hazmat warnings should be right on the can, in legible print. I also second the remarks of others that a nozzle should be provided so that one can better aim the spray into cracks and holes.The ants I am trying to get rid of are embedded in wood. Not sure a spray will do the job, but am willing to try. Lets hope I have some results.

    Review Rate
    Review posted on www.terro.com
    September 1, 2017
    Worthless. Doesn't work By Kim

    Worthless!! I bought a can and sprayed around ant trails in the house. Killed a couple of ants who unlucky enough to be present, but the next day they were back in numbers right where I sprayed. Sprayed again, and the ants were back the next day. The only way this stuff will kill ants is if you squash them with the can... :(

    Response From Terro®
    Patty : Consumer Relations Representative

    Hello Kim,

    We apologize for this experience and would like the opportunity to learn more.  

    This product is a contact killer that will begin to affect the ants as soon as they come in contact with it. The residual effect lasts up to 6 weeks.  Please give our Consumer Relations Team a call at 1-800-800-1819 x 458 so we can better understand the situation and provide assistance.

    Review Rate
    Review posted on www.terro.com
    July 13, 2017
    AMAZING! By Keith

    Yea, this stuff is the best. My family moved into an old farm house that was built in 1910. Plenty of time for ants to build nests in walls and under the house. We tried EVERYTHING. I heard terro was the best from a pest guy, and bought the liquid ant traps. They certainly drew in ants, but I think the size of the infestation made no difference if a few colonies got wiped out. Ants were everywhere. On my computer desk, bedrooms, kitchen, bathroom...everywhere. Its not like we are slobs either. These ants were seeking warm electronics, and cook books that may have had drips of residue from messy recipes, water sources, and just randomly showing up. Ant motels didn't work. Perimeter granules didn't work. Clove and cinnamon hippy mixtures didn't work. It got to the point where everything went into ziplock bags and we just expected to have to kill hundreds of ants on countertops every morning. Nothing was safe to even set down. The final straw was when I was on the couch and felt ants crawling up my arm. I got the heebies and decided to go mow the lawn. While weed whacking, I stepped in an ant hill and had ants crawling up my leg. I snapped. Drove to a mom and pop hardware store where they had this spray. I sprayed the problem areas and to my amazement the next morning, no ants. I've gone through and kept spraying new areas where they inevitably pop up. After about a week of that, there are no ants. I am so satisfied with this product.

    Review Rate
    Review posted on www.terro.com
    June 12, 2017
    Good product By Phyllis

    had purchased Terro ant spray before and satisfied with product. Purchased more online, as could not locate spray in stores. It works very well in my opinion and have frequently recommended to family/friends. The only thing the spray did not/could not do was eradicate ant hills in the yard...after several spray treatments, we ended up purchasing and using Terro granuals to get rid of the enormous ant hills in our yard instead and that's taken care of the ant hills.

    Review Rate
    Review posted on www.terro.com
    October 8, 2016
    Terro evaluation By DBooker4314
    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.
    Review Rate
    Review posted on www.terro.com
    September 19, 2016
    excellent product By sherrycam
    I always recommend this to any one having an ant problem. It is the best product out there.
    Review Rate
    Review posted on www.terro.com
    August 23, 2016
    Do not spray directly onto insects By MonicaPrz

    I'm pretty surprised no one in the reviews mentions any negatives. While this product is great for spraying edges, it doesn't prove so when spraying directly onto insects/ ants or crevices. Its aerosol can has so much pressure or air that when you spray it, it sends the bugs flying. You literally need to get up close enough to whatever you are spraying as it does not come out in a stream like other brands. This can also be a problem if you're spraying crevices as it does not get directly into cracks; spraying only the outside as the high amount of pressure sends the product into the air. This was no defected can as I bought 2 and both sprayed the same. Negatives aside, it does work up to several weeks.

    Response From Terro®
    Patty : Consumer Relations Representative

    Hello Monica, We appreciate the time taken to provide this feedback and apologize for the experience. Our product team always looks for possible product improvements and consumer feedback is important. This product is designed to be applied as a coarse spray and surfaces should be sprayed until wet. Please contact our Consumer Relations Team at 1-800-800-1819 x 458 for additional assistance.

    Read All Reviews (24) Write a Review
    Q.I am interested in this spray product but worried about my dogs and anyone inhaling the spray. The infestation in my home and perimeter of my home is horrible. After following their many different trails, I suspect their home is outside. Do you suggest I spray this outside? I don’t want to lure them in the house. Also, how and when do I clean the area (with all the dead ants that I hope to see!) After 6 weeks? With just any rag? Thank you!

    This product can be used both indoors and outdoors. We recommend keeping children and pets away from the treated area until the spray has dried. The treated area does not need to be cleaned after it has been sprayed, however, if you wish to you can use soap and water.

    Q.I am wondering how effective this spray, Terro Ant Killer Spray, is against fleas. Specifically, I know I may have human fleas infesting my home, based on the specimens caught in non-baited glue traps that were given to me by my local county vector control agency, which were then examined in their laboratory. The agency's reporting back to me by email was how I found out I had human fleas in my home.

    This product can be used to control ants, spiders, Asian lady bird beetles, black widow spiders, cockroaches, crickets, scorpions and silverfish. It has not been tested for fleas.

    Q.Is this product safe around dogs?

    We recommend keeping adults, children, and pets out of the treated area until the spray has dried. Also ensure that they are not able to come in contact with the product directly or through drift when applying.

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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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