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
    April 18, 2018
    Ant Pinic Surprise! By JIm

    Very, excellent product!! Had ants on my kitchen counter and coming from the window sill.. Amazing they can squeeze in a window that is tightly shut! I used this product and within 3 days they were gone.. At first they brought their friends to eat the tasty delight, but paid the price later!! I will say though that if some of the syrupy ant bait is left too long in one spot, it will dry and become a little difficult to scrape off. But other than that, I will buy more for this Spring!

    Review Rate
    Review posted on www.zarebasystems.com
    April 10, 2018
    It’s like ant crack. By Dala

    Amazing, tried Raid traps and the ants wouldn’t come close to it. Removed the bait from the container and the ants would crawl right over it. Tried Terro and it’s like ant crack, they went ballistic for it and about two days later not an ant in sight. Would recommend this to anyone.

    Review Rate
    Review posted on www.zarebasystems.com
    March 26, 2018
    Best ant killer ever By Joanna

    This stuff is amazing!!! I have been fighting ants for few weeks now and nothing worked. I finally stumbled across Terro. I put the traps around the house Saturday afternoon and on Monday there was no sign of any ants

    Review Rate
    Review posted on www.zarebasystems.com
    March 24, 2018
    Thumbs up to this product so far! By Cher

    So far I give it a 5 star. We have big black ants invading our kitchen anf put out some white plastic bait traps purchased at walmart and the ants did not go near them. Bought the terro put them out b4 bed and in the morning ants were feeding. Many more ants were feeding throughout the day. Feeling very positve about this product. Will update later. ☺

    Review Rate
    Review posted on www.zarebasystems.com
    March 21, 2018
    Best By LW

    This is the best. My ants skip the Raid and Hot Shot baits but tug each other out of the way to get to the Terro stuff. The next day we are ant free again. I won’t waste money on anything else.

    Review Rate
    Review posted on www.zarebasystems.com
    February 21, 2018
    Great ant killer By Me vs the Ants

    Nuclear option sounds about right, just bought this and applied it along the kitchen splash board. Coincidently, I had another trap from a well known brand that hasn,t worked along the trail. The ants actually go up the wall to avoid the other trap to get to the Terro Ant Killer.

    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.

    Read All Reviews (48) 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