Shopping Cart
0 Items

TERRO® Liquid Ant Killer

Model #: T100

Best used for:

  • 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

Read complete product details

Buy 2+   $3.13  5% off
Buy 6+   $2.96  10% off
Buy 12+   $2.80  15% off
Buy 24+   $2.63  20% off

Availability : In stock

Product Images
Related Videos

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 kill the worker ant in two to three days, giving the foraging ants enough time to share the bait with the rest of the unsuspecting colony. 

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?

Bait vs Contact Killers

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.   

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.

This is the only way to get rid of both the ants you see and the thousands you don’t! 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

  • 0.36 fl. oz. each
  • Contains sodium tetraborate decahydrate (Borax) (5.40%) and other ingredients (94.60%)
  • Reviews
    TERRO® Liquid Ant Killer is rated 4.8864 out of 5 by 44.
    Rated 5 out of 5 by from The only effective product ! Very effective and the only product that actually works. Highly recommended.
    Date published: 2015-09-25
    Rated 5 out of 5 by from Amazing I had a very bad sugar ant problem. They were everywhere. Several months back I purchased terro liquid ant bait. It is wonderful. Wherever you see the ants put a drop and you will be amazed at how quickly you can these little pest under control.
    Date published: 2015-09-22
    Rated 5 out of 5 by from Great product. My order for the Terro Ant Killer arrived promptly a few days ago, and the ants have vanished. I have used this product through the years, and it is simple to use and effective.
    Date published: 2015-09-16
    Rated 5 out of 5 by from Works amazingly every time I don't usually write reviews but I love this product. I found out about it when I was researching ant problems about two years ago. Every time I find ants, and this last time they were all the way down the hall from one end of the house to the other, I put out small pieces of foil about six inches apart and put two large drops of Liquid Ant Killer on them. I watch the ants find the product, "call their friends over" and dozens of ants feasting on the liquid. The next morning I see just a few so I put more liquid. Before long they are all gone. I do wash my hands with hot soapy water a lot while I'm handling the product or if I kill an ant that is "getting away" up the wall. Thank you for an amazing product.
    Date published: 2015-09-12
    Rated 5 out of 5 by from Great Product! I had used Terro Ant Killer (liquid form) several years ago with good results, and had not needed it again until recently. I am in a different state now, and was not able to find it locally, so was pleased that I could order it from the Terro website. It arrived very timely, and after using the product for probably two days, the ants in my kitchen were gone. Thanks, Terro!
    Date published: 2015-09-11
    Rated 5 out of 5 by from REALLY WORKS - first time Assaulted by small ants. Put the liquid bait near the entrance point and the ants swarmed it. Slowly the swarm got smaller and later that day they disappeared. So far they have not returned.
    Date published: 2015-08-31
    Rated 5 out of 5 by from Terro ant killer Put it down two days ago , wow no more ants , thanks
    Date published: 2015-08-19
    Rated 4 out of 5 by from After a few hours seeing fewer ants. I have been having an ant invasion problem through-out the summer coming through the window sill. The apartment where I live sent out a pest control company to address this problem, what a joke. On their last visit the pest control worker set out versions of their baits, however removed them due to the baits were filled with ants. After removal of the ant baits he put down a liquid gel which lasted about 13 days, after placing the stuff believed to be the point of entry, very disappointed that the Black ants began to resurface in full force. Needless to say, I freaked out after having a hectic day to began with. I went to the hardware store and purchased Terro baits as well as their liquid ant killer, it haven't been a full 24 hours yet, but seeing remarkably less ants. I will follow-up with a post about Terro brand and it's effectiveness, hopefully to give it 5 stars, and indicate if I will remain a devoted customer or not.
    Date published: 2015-08-15
    • 2015-10-09T08:46CST
    • bvseo_cps, prod_bvrr, vn_cps_3.1.6
    • cp_1, bvpage1
    • co_hasreviews, tv_1, tr_43
    • loc_en_US, sid_T100, PRD, sort_mostRecent
    • clientName_terro

    On my second day of trying to kill small ants.  They were attracted at first and surrounded the dots of Terro, but since then have not been interested no matter how I place it in their path.  What do I do now???

    Asked by: Lynne
    We recommend leaving the bait placed until the number of ants sharply decreases. The ants may no longer be searching for a sweet based food. If the ants continue to visit the area but do not eat the bait, a different product may be a better solution for this unique situation. Please contact us directly at 800-800-1819 x 458 for additional assistance.
    Answered by: Consumer Relations
    Date published: 2015-10-07

    Can I use this product to kill White Footed Ants? 

    Asked by: MJA74
    Yes this can be used to control White Footed Ants.
    Answered by: Consumer Relations
    Date published: 2015-09-29

    I have been using this stuff for about a week now. The ants are atrracted to it, but they will not die. How long will it take. Also the liquid gets a hard shell after just a few hours. can the ants penetrate the hard film that happens?

    Asked by: John
    Once an ant consumes the bait they will die within 24 to 48 hours. If the liquid is hard the ants will not be able to consume it. We recommend replacing the drops every 24 hours or when it does become hard.
    Answered by: Consumer Relations
    Date published: 2015-09-24

    Is it necessary to place the bait on paper? If so, why? I've been placing drops on the counter where the ants are entering and they love it, but over a month has passed and they are as bad as ever! Does the lack of paper have anything to do with it?

    Asked by: baron
    We would not recommend placing the bait directly on the counter as it can dry over time and be hard to remove from the area. If it has been a month and you are still seeing activity then it may be a very large colony or multiple colonies feeding from the bait. Once a decrease is noticed the bait should be removed.
    Answered by: Consumer Relations
    Date published: 2015-09-17

    my Terro is getting turning solid overnight, is this common?

    Asked by: memguy
    To help prevent the liquid from drying out, we recommend adding a few drops of fresh liquid each day. This will help ensure that the product remains liquid and the ants will be able to consume the bait.
    Answered by: Consumer Relations
    Date published: 2015-09-17

    is this product harmful to humans

    Asked by: Anonymous
    This product can be used as directed in the home to control ants. The baits should be placed in areas that are inaccessible to children and pets.
    Answered by: Consumer Relations
    Date published: 2015-09-17

    does the liquid terro work on grease ants?

    Asked by: simon
    This product is effective against most household ants, however it will not attract ants that are searching for a protein or grease food source.
    Answered by: Consumer Relations
    Date published: 2015-09-17

    When liquid dries after a  couple of days and ants continue to eat at it, is it still active, or does it have to be in liquid form to be transported and kill the colony?

    Asked by: Rich
    The bait should be replaced once it has dried. If it has hardened the ants are not able to consume it.
    Answered by: Consumer Relations
    Date published: 2015-09-17
    • 2015-10-09T08:42CST
    • bvseo_cps, prod_bvqa, vn_cps_3.1.6
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_24
    • loc_en_US, sid_T100, PRD, sort_recentAnswersFirst
    • clientName_terro
    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.

    • Free Shipping Over $44.99!