TERRO® Liquid Ant Killer

Model #: T100-12

48 reviews
0 5 4.7

Reward Points with My Account Learn More »


  • 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
    June 8, 2018
    Where or where have all the ants gone? By JR

    Great product. Eliminated small colony in my kitchen within 24 hours. I had several hundred ants running over counter tops, kitchen sink, and into the cabinets all coming from one source out of a crack behind one cabinet. I put out 4 traps. Within 20 minutes all four were being visited. Even the twist off cap that I had laid down on the counter top was getting activity. A steady stream of ants going to each bait station. Within a few hours I could see the numbers were starting to decrease and by the next morning there were only a half dozen or so coming to the traps. By evening all activity seems to have stopped. Boric acid is a relatively safe insecticide and the design of the traps makes it easy to use safely. Borates are used in many other applications including a laundry detergent. I have 8 more traps ready if a new colony finds its way into the house.

    Review Rate
    Review posted on www.zarebasystems.com
    June 3, 2018
    Best stuff ever By Debi

    The ants run to the circle of death!!! I've never seen anything like that before!! Ants gone. They even found the bottle and were trying to get inside to get more!!

    Review Rate
    Review posted on www.zarebasystems.com
    May 31, 2018
    Excellent product By Kimmie

    I tried a knock off because I couldn’t find Terro at the store closest to me and it didn’t work one bit. As soon as the Terro arrived in the mail my ant problem disappeared. Best product ever!

    Review Rate
    Review posted on www.zarebasystems.com
    May 30, 2018
    This stuff just works. Period. By Ben

    LOVE this stuff. Been using it for years, anytime ants find a way into the house. Watch them, figure out their path, put down some drops. Pretty soon, there will be a ring of ants around, devouring it. If there are a lot of ants, you may need a few separate drops. As long as you see them, have some out for them. Once they disappear, don't forget the most important part- exclusion! Seal up the gaps where they were getting in.

    Review Rate
    Review posted on www.zarebasystems.com
    May 22, 2018
    Be gone ANTS!!!! By firehawk

    Every year at this time these pesky ants come in and can wreak havoc everywhere getting in sugar creamer etc. This stuff rocks and gets rid of all ants. I am thinking they take back to nest where other ants devour the taste to succumb to their ultimate death.

    Review Rate
    Review posted on www.zarebasystems.com
    May 22, 2018
    Great Product With Quick Results By Al

    This was recommended by an employee at the hardware store and he was right. We had a ton of ants show up one afternoon sneaking into the kitchen through the overhead stove vent. Put one dose out on the counter and another inside the vent outside and 24 hours later the ants were gone. It is true that a ton more will start showing up once it’s out but let them eat. They’ll be gone soon enough.

    Review Rate
    Review posted on www.zarebasystems.com
    May 11, 2018
    Killer Ant Killer!! By KJ

    Used this product at my previous home.. in my new home, saw ants around my enclosed patio and in my kitchen and bathrooms.. used Terro and again.. Ants gone in two days! This is stuff is killer.. (pun intended).

    Review Rate
    Review posted on www.zarebasystems.com
    May 11, 2018
    Excellent Product!! By KJ

    This stuff works! Period. Apply it.. they feast on it.. a day later.. NO ants!

    Review Rate
    Review posted on www.zarebasystems.com
    May 9, 2018
    Terro works! By JJ

    At the beginning of warm days here in Virginia and after the mulching of my patio garden, I saw ants near the front door. I had some Terro that had been around for years - it was dark brown and thick. Nevertheless, I was able to squeeze some from the bottle and put it down. I didn't know if it would still work. The ants were gone the next day. I immediately bought another bottle for next year. Thanks so much for a product that works!

    Review Rate
    Review posted on www.zarebasystems.com
    May 8, 2018
    Great stuff works wonders By Gobucks88

    This is the best ant bait on the market. Every year around this time we get little black ants In our kitchen. Couple drops of this stuff on the cardboard tray and those stupid ants are lined up for some liquid death. Can’t get enough of this stuff. Just make sure your area is clean so they aren’t tempted to eat anything else

    Read All Reviews (58) Write a Review

    There are no entries.

    Ask Your Own Question
    • Yes, sign me up for an eNewsletter subscription so that I can receive information about products, enhanced services, exclusive sales and other special offers.

    • Reload captcha

    * Required Fields

    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.

    Recommended Products