TERRO® Liquid Ant Killer

Model #: T100-12

91 reviews
0 5 4.6

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  • Attracts & kills all common household ants
  • Attracts ants fast
  • Kills the ants you see and the ants you don’t
  • Buy More, Save More - discounted price per each

Product Description:

Terro Ant KillerTERRO® Ant Killer attracts and kills all common household ants. The liquid ant killer is specifically designed – using the active ingredient Borax – to allow worker ants to consume the product and survive long enough to carry the liquid back to the nest and deliver a dose to the rest of the colony. Complete control may take up to two weeks. 

To use our best ant killer, simply apply the product directly from the bottle onto the provided cardboard squares and place near indoor areas where ants are spotted.

How Does It Work?

TERRO® Ant Killer is a bait product, so at first ants will come in large numbers, but they will soon disappear. This liquid ant killer is specifically formulated to allow worker ants to consume the product and survive long enough to carry the liquid ant killer back to the nest and deliver a dose to the rest of the colony. Baiting enables you to get rid of both the ants you see and the ants you don't.   

Leave our at-home ant killer undisturbed while the ants are actively feeding on it. Be sure to eliminate all other food sources in the area. This will ensure that the ants aren’t tempted to eat anything but the deadly liquid ant killer – indoors and out.

While the active ingredient in our indoor ant killer will ultimately kill the worker ant, it interferes with the ant's digestive system and works just slowly enough that the worker has time to get back and share the ant bait with the rest of the colony. This slow kill is needed to allow time for the foraging ants to make several trips to the bait and deliver enough bait to the rest of the colony.  

Directions for Use

Why Liquid over gel bait?

Tear the "PLACE TERRO® HERE" cardboard squares from the home ant killer packaging along the perforated lines and simply apply the liquid ant killer directly from the bottle onto the square. Small pieces of paper, cardboard or foil may also be substituted.

Place this household ant killer where ants are seen, such as the edges of sinks, tubs, window sills, under food cabinets, along floors and baseboards, and in corners. Do not skimp on bait placements; the more bait placements, the better.

The key to effectively eliminating the ant infestation is to monitor the placements and ensure there is always a fresh supply of TERRO® Ant Killer for the ants to feast on. Depending on the size of the ant invasion, complete control may take up to two weeks.

Resist the temptation to interfere when the ants come in droves — your patience will pay off as you watch your ant infestation dwindle and then disappear.  

Since invading ants usually have outdoor nesting sites, it often helps to put our best ant killer outside the home, close to where ants are found entering the structure. Ants typically follow defined trails from the nest to food or water, so placing the ant killer close to these trails will improve control.

View video for tips on how to easily and effectively kill common household ants with TERRO® Liquid Ant Baits:


Product Features

  • Attracts and kills all common household ants
  • Convenient and easy-to-use
  • Place baits near ant trails or where ants are numerous
  • Use enough ant killer to ensure sufficient supply for the ants
  • What’s in the Box

  • 1 oz bottle of ant killer
  • Nine cardboard squares for product placement
  • Specifications

  • 1.0 fl oz
  • Contains sodium tetraborate decahydrate (Borax) (5.40%) and other ingredients (94.60%)
  • Reviews

    Disclaimer: Zareba® System 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.zarebasystems.com
    May 14, 2019
    Excellent By TR

    I've used Terro for years and highly recommend it for ants.

    Review Rate
    Review posted on www.zarebasystems.com
    May 5, 2019
    My go-to ant killer...no home should be without it By greg21

    No home should be without Terro Ant Killer! I've been using it for 6 years now, & I won't use anything else. Before using Terro, I used to use Raid ant spray & Combat ant baits, but they didn't work as well as Terro does, b/c the Combat baits didn't work period & the Raid spray only killed the ants I could see & not the ones I couldn't see. Terro is better than Raid & Combat b/c it's liquid Borax, so it's sticky & sweet, which ants are attracted to. If patience isn't a virtue of yours, then Terro probably isn't for you b/c it's a slow-kill formula; the scavenger ants take it back to the colony and pass it on the queen ant, who passes it on to the rest of the colony, so it'll take some time for the formula to wipe out the colony depending on its size.

    Review Rate
    Review posted on www.zarebasystems.com
    April 18, 2019
    Why different this time By Dee

    Used in the past worked great this time no, ants still eating this and getting inside the package this has been a few weeks used two packages, small black ants move quick.

    Response From Zareba®
    Jules : Consumer Relations Representative

    Hello Dee,

    If you find that the ants are not interested in the ant bait, it may be that the ants are not interested in sweet treats at the moment. We recommend adding a contact killer, like TERRO® Carpenter Ant & Termite Killer, to your ant control plan. For any questions feel free to contact our Customer Relations Team at 800-800-1819 x 458

    Review Rate
    Review posted on www.zarebasystems.com
    March 24, 2019
    Works great! By Amy

    I swear by the Terro Ant baits! Nothing works better. Give it a few days and all the ants will disappear!

    Review Rate
    Review posted on www.zarebasystems.com
    February 11, 2019
    Non-effective By Joan

    No, this product did not do the trick. It left big sticky globs wherever we put it and did not stop the ants from invading our home.

    Response From Zareba®
    Kathryn : Consumer Relations Representative

    Hello Joan,

    We appreciate your feedback and the time taken to provide it! These comments have been shared with our Product Managers. This bait will only attract those ants that are interested in sweet foods. Please feel free to contact our Consumer Relations Team at 1-800-800-1819 x 458 for assistance. We are happy to help!

    Review Rate
    Review posted on www.zarebasystems.com
    January 29, 2019
    Ant eradicator ! By Julie

    We had been dealing with ants from Thanksgiving through Christmas. We were going nuts, we tried every thing you could think of and every poison we could find I hadn't heard of Terro until I was complaining to my coworker about the ants. She told me to order Terro, which I did the same day, Our order arrived a few days earlier than expected and I put it to use immediately. We had swarms of ants coming from everywhere heading to the Terro. Within 3 days the ants were gone, not one in sight! I highly recommend Terro!!!

    Review Rate
    Review posted on www.zarebasystems.com
    December 19, 2018
    Exceptional product By Steve

    Great results! Ghost ants gone in just 2 days.

    Review Rate
    Review posted on www.zarebasystems.com
    October 23, 2018
    Excellent product but will place fresh down each day for awhile. By Teddy!

    I wasn’t certain how to use but placed on the tiny squares and seen no improvement so then I used larger cardboard pieces on the floor and hundreds cane in contact and each small amount had them circling it like the last supper. I didn’t see any leave but more came to feast.

    Review Rate
    Review posted on www.zarebasystems.com
    October 17, 2018
    Excellent product By Karen

    I bought this product, (I purchased the ready to use stations) and I also bought another bait station by another company. Not one ant was observed entering the 'other' station, but holy cow did they go nuts over this stuff! That was yesterday afternoon, I had hundreds, if not thousands of the creatures coming out of the wall to feed. Now today? It's only a few stragglers still moving, and they are moving sluggishly, love it. No fuss, no mess, open station, place where you see the ants, and voila! Ant are gone

    Review Rate
    Review posted on www.zarebasystems.com
    October 17, 2018
    Great product, highly recommend By Karen

    I bought the pre baited stations yesterday to try to rid myself of an ant invasion. I put them out yesterday afternoon, by last evening I was shocked at how many ants there really were! They were in a feeding frenzy! I also put out baits from another company, the ants didn't touch those, not one ant was observed entering those baits. So here we are not even 24 hours later, and the stream of ants is down to just a couple coming out of their hidey hole, I am astounded at how fast, and effective this was. And simple, no mess, no fuss, just open the station and place it, absolutely a great product!

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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.

    What’s the difference between liquid and gel ant baits?

    It’s a little known fact that adult worker ants cannot digest solid food (bait). Their anatomy is designed for transporting and digesting liquids only. Solid foods must be carried back to the colony for additional processing by the larvae stage. Liquid baits exploit this unique physiology by making it easy for ants to transport the liquid bait back to the rest of the colony, including the queen, larvae and other workers.

    I just placed TERRO Ant Killer in my kitchen and it’s attracting more ants, not killing them! What’s going on?

    You have nothing to worry about! Initially, you will see more ants. As ant foragers look for food, they are attracted to the sweet liquid in the bait which they consume and carry back to feed to the rest of the colony. On the way back to the nest, the ants drop what it called a ‘trail pheromone’, letting the other ants know where the tasty food supply is. In turn, these ants follow the trail to the bait which explains why you initially see more ants.

    The active ingredient in the bait interferes with the ants' digestive systems, eventually killing the ants within 24-48 hours after consumption. This slow kill gives the worker ants enough to get back and share the bait with the colony. Baiting is the only way to successfully wipe out the ants you see and the thousands you don’t.

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