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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

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Availability : In stock

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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 4.0 out of 5 by 4.
    Rated 5 out of 5 by from Works Fantastically! Ants immediately attracted to the bait, now no more ant problem!
    Date published: 2015-05-21
    Rated 5 out of 5 by from Works Great I just bought some and it works great And kills them
    Date published: 2015-05-10
    Rated 5 out of 5 by from Simple and Effective. I'm not sure what happened with the other reviewer but I've always had great luck with this product. It's always been my staple for getting rid of ants in my house. I had to use it about three years ago and I have been ant free until this year. It seems just as effective as it was last time. I really like the fact that I can place it anywhere and on any flat surface, on a piece of foil or cardboard, that I deem necessary. I'm watching the ants eat it as I type this and looking forward to their eradication.
    Date published: 2015-05-07
    Rated 1 out of 5 by from Does not seem to work I have two places in my home with small ants. I have used Terro liquid for two weeks and replaced it ever day to stay liquid. I see no decrease in the ants!! I think I am just feeding them and making them thrive. HELP!
    Date published: 2015-04-28
    • 2015-05-23T10:23CST
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    After 4 days I only see one or two ants in the area treated. Is it too soon to stop laying down fresh Terro liquid?

    Asked by: kenneth
    No, four days is often enough time. Just keep a close eye on their entry areas for a couple days, and if you see ants following one another's trail, assume that a different colony has found you & start again.
    Answered by: handywidow
    Date published: 2015-05-13

    I have been using this Terro Liquid Ant Killer now for over a week and I still have ants. Can you tell me how long it will take for the ants to die off? I always have at least 1 to 2 dozen ants at any given time. 

    Asked by: Patty
    Our TERRO® Liquid Ant Killer will kill the ants that consume it within 24-48 hours. Depending on the size of the colony, it may take several weeks until the colony has been eliminated.
    Answered by: Consumer Relations
    Date published: 2015-05-05

    Is it safe for dogs to be around it?

    Asked by: Parker
    People are often surprised to learn that Borax, the active ingredient found in TERRO® liquid ant bait, is a natural mineral found in many common household products such as hand soaps and toothpastes. Borax has a low toxicity for people and animals, but ants are another story. When ants consume the Borax bait, it interferes with their digestive system and gradually kills them. This slow kill allows time for the worker ants to consume the bait and head back to the nest to share with the rest of the colony. But, as with any pesticide, it's important to read the included instructions for information on how to best store and apply the product around children and pets.
    Answered by: Consumer Relations
    Date published: 2015-04-30

    Does this product kill carpenter ants ?

    Asked by: bowhunter

    Does this product kill Carpenter Ants?

    Asked by: BobT55

    will this product kill bell hornets?

    Asked by: unclebear

    where do you cut to open very confusing

    Asked by: cy trippi
    • 2015-05-23T10:58CST
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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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