TERRO® Liquid Ant Killer

Model #: T100-12

42 reviews
0 5 4.7

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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
    February 16, 2018
    Great By Dd

    Tried lots of baits but this one always works on tiny sugar ants. Location: Oregon.

    Review Rate
    Review posted on www.zarebasystems.com
    January 5, 2018
    Very Satisfied By Truetexan

    Bought a house in 2000. Soon found that it was extremely infested with sugar ants. Ants were constantly getting into the dishwasher, bathtub, and shower. They were destroying boxed food in the pantry, daily. I sprayed a lot of poison, which didn't work. Then, I tried Terro liquid ant killer. It worked amazingly well. My favorite way to apply it is by using a Post-it Note. I just stick it to the wall in every ant trail, then apply a few drops of Terro. I would re-apply as needed, daily for 2 or 3 days. After about 3 days, the ants greatly diminished. Then, after a couple of weeks, the ants were gone! It has now been over 10 years. The ants remained gone. Anytime I find new ants in the house, I use Terro Ant Killer. It works! Thankyou Terro!

    Review Rate
    Review posted on www.zarebasystems.com
    December 24, 2017
    Just feeding ants By r

    Many years ago I used Terro to get rid of ants in a bathroom. I put the bait out and the ants were permanently gone within hours. Fortunately I haven't had any ant problems until about 2 weeks ago when I found ants in the laundry room. I purchased some Terro expecting similar results. The active ingredient has changed since my first use. Not sure how this is supposed to work now. Are the ants supposed to keep eating until they become obese and eventually die from diabetes? They just keep eating and eating. One morning I looked and the ants were all linked together spelling out the word, "MORE". It has been over 2 weeks. Seems like a waste of money to me. Sort of reminds me of when Coca Cola tried to change their formula to New Coke. It didn't work any more.

    Response From Zareba®
    Patty : Consumer Relations Representative

    We are sorry to hear that the desired results have not yet been seen and will be happy to help.

    The formula for this product has remained unchanged since the 1980s. This bait is designed to kill the ants that consume it within 24-48 hours. This allows them time to take the bait back to the colony to share with other ants. Depending on the size of the colony, it may take several weeks until a decrease in numbers is seen. We recommend continuing to apply the bait until there is a sharp drop in the number of ants. For larger infestations, a contact killer may be needed.

    This product is covered by a 30-day satisfaction guarantee. Please give our Consumer Relations Team a call at 1-800-800-1819 x 458 for further assistance.

    Review Rate
    Review posted on www.zarebasystems.com
    December 22, 2017
    Great stuff for all types of ants By John

    This stuff is great. It has worked for me on common sugar ants and actually helped get rid of some red ants that had started a small mound outside. Definitely better than a messy spray.

    Review Rate
    Review posted on www.zarebasystems.com
    December 13, 2017
    Thank you! By Chris

    Like all the other reviewers previously stated, don’t think twice about buying this product, do it ASAP. Will get the job done and fun to watch the ants engorge themselves to doom! Without a doubt the best $4 I have ever spent and I don’t have to worry about toxicity with the kids or pets. Buy it!

    Review Rate
    Review posted on www.zarebasystems.com
    November 11, 2017
    Working By Deborah

    I think that hundreds of ant must have invaded our crawl space before they appeared in our kitchen. I refuse to use toxic products, and although it's taken quite a long time to get rid of all those ants, we're finally down to just a few, thanks to the Terro liquid we've been using.

    Review Rate
    Review posted on www.zarebasystems.com
    November 10, 2017
    Nothing works better, NOTHING! By Stingray

    Had an older mobile home in Arizona that ants had literally taken over, filled sections of the outer wall from bottom to top plates, as well as a basketball sized crowd of them hanging under the kitchen sink. Tried everything we had on hand, nothing seemed to work except wasp spray, but ran out of that real quick. 2:00AM, no stores open, getting panicked, they're in the bed, shower, everywhere but the PANTRY! Finally got to the store when it opened and was told to use the TERRO liquid bait. Did that, amazed at how quickly the ants congregated around those drops and began consuming it all. Couldn't believe it, but true! Just a few hours later, they were GONE! ALL OF THEM! Now that we're living in Oklahoma, I've stocked up with plenty of it and use it religiously!

    Review Rate
    Review posted on www.zarebasystems.com
    November 4, 2017
    The nuclear option for ants By Thomas Jones

    We had a colony of ghost ants get inside our apartment in Hawaii. Over the course of a week they had made it into the kitchen and into 2 bedrooms despite our attempts to kill them with things like raid or other traps. I was starting to lose my mind because they were getting everywhere. I realized at this point we had made one colony into at least 3 through "budding". We went out and got a bunch of stuff, and this tiny little bottle of Terro Ant Killer looked like a long shot. i used the little cardboard plates and set out a bunch in all the areas we saw the ants, and watched a movie with the family. About a half hour later I went to see if there were any ants and HOLY GOD. They were all over this stuff. They had lined up around the edges like wildabeast drinking from the last waterhole in the Africa. I thought we had a few hundred ants, but there must have been a thousand. I checked, and all the other traps were in a similar state. I started to laugh out loud like a madman. In 24 hours, it was all over. the bait was vacant except for about a dozen ants who got stuck and drowned. We haven't seen a single ant for over 3 weeks now. The most difficult thing about this product is watching the ants go nuts with the bait and resisting the urge to kill them when you see it. Its disgusting. But do like I did, laugh like a madman and rub your hands together. They are already dead, and if you leave them to it, they will spread the pestilence to all their disgusting kin. If ants ever become sentient, they will put Terro on trial for crimes against antkind, because this is ant genocide in a bottle.

    Review Rate
    Review posted on www.zarebasystems.com
    November 3, 2017
    excelente By Control Natura SAS

    En nuestra empresa hemos probado todo tipo de productos para hormigas pero este es el mejor de todos, efectivo 100%

    Review Rate
    Review posted on www.zarebasystems.com
    October 15, 2017
    The Best By Tank

    I can't express how great this stuff works. We tried everything, but nothing worked. I friend referred this to me and it completely got rid of all the ants in about 5 days. Best product on the market.

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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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