When you have a bug problem, you want to ensure your efforts are as simple and effective as possible. TERRO® Liquid Ant Killer uses borax to kill the ants you see, as well as the ants you don’t see. It works by allowing the forager 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. For your convenience, the packaging conveniently comes apart to allow for easy placement.
How Does Liquid Ant Killer Work?
Since this is a bait, initially you will see more ants – but don’t worry, this is a good thing. As ants forage for food, they are easily attracted to the sweet liquid. After finding the bait, worker ants consume it and leave behind a pheromone trail leading back to the colony. This trail lets other worker ants know where the newly discovered food supply is. This is why you will see more ants in the beginning.
Meanwhile, the active ingredient, borax, is slowly interfering with each ant’s digestive system, ultimately killing them, but leaving enough time for the ants to go back and share the dose with the rest of the colony. This slow kill is necessary so that foraging ants can make several trips to the bait, allowing you to get rid of both the ants you see and the ants you don’t.
Where to Place Liquid Ant Killer
Place TERRO® Liquid Ant Killer near ant trails and other locations where they are numerous. Apply the baited cardboard tiles on the edges of sinks, tubs, windowsills, under food cabinets, along floors and baseboards and in corners. The more bait placements, the better! Be sure to leave the ant killer undisturbed while the ants are actively feeding on it.
Where to Place Ant & Roach Baits
TERRO® Liquid Ant Killer is very easy to use. Before placing the ant killer, be sure to remove other sources of food, such as crumbs, sugar and grease spots to prevent attracting them elsewhere. Do not place where you’ve already sprayed insecticides, as the pests may avoid the ant killer.
Tear the "PLACE TERRO® HERE" cardboard tiles from the packaging along the perforated lines. Then, apply drops of the liquid ant killer directly from the bottle onto the smooth side of the tile. you may also substitute with small pieces of paper, cardboard or foil.
Place the ant killer tiles on a flat surface near signs of target pests. Place additional tiles anywhere they may enter your home. Heavily infested areas may require additional placements.
Monitor placements regularly, but do not interfere with the pests or bait. Add more liquid if it goes dry or simply add more tiles to ensure there's always a fresh supply for the ants. Depending on the size of the ant invasion, complete control may take up to two weeks.
TERRO® Liquid Ant & Killer Product Details
Interested in learning more about TERRO® Liquid Ant Killer? Take a closer look at its in-depth specifications.
TERRO® Liquid Ant Killer
Model #
T100-12
Includes
1 oz bottle
Nine cardboard squares for product placement
Eliminates
Common household ants, including acrobat ants, argentine ants, big headed ants, cornfield ants, crazy ants, ghost ants, little black ants, odorous house ants, pavement ants, white footed ants, and other sweet eating ants
Common household ants, including acrobat ants, argentine ants, big headed ants, cornfield ants, crazy ants, ghost ants, little black ants, odorous house ants, pavement ants, white footed ants, and other sweet eating ants
I have used terro for years. its the best thing since sliced bread. you do have to be patient. use it and wait about 4 days. if you see more then use more terro and they will eat it and take it back to their colonies and eventually all the ants will be gone. just give it a try. I did and I love it. I would never use anything else.
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This product does not work ...
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Aug 19, 2025
This product does not work the ants walk around it. Set traps as directed. I would like a refund
I thought this product would work but I feel like all it does is attract more ants. It creates a nasty infestation and I have to spray to kill them I can’t keep them like that in my kitchen.
I have been using terro products for many years with very good success. I used to buy the bottle in which you put a drop of liquid on a tiny piece of cardboard but saw the 4 pack of filled bait stations and I bought 2 of them because I thought that these would be MUCH better. WRONG! The instructions make it look so easy to remove the tab prior to placement, I couldn't get the tab to break off even with needle nose pliers!! One of them I ended up spilling it on myself and on the floor because it is mutilating the bait container while trying to break off the tab. I have tried twisting the tab, bending it back and forth. They were all the same, would NOT break off and I ended up with mutilated bait packs!!! I will go back to using the liquid on cardboard, if I can still find it here.
The "Multi-Surface Liquid Ant Bait" [CTN-T334B-2 Rev 1124] design with an adhesive application is USELESS! The double stick adhesive is inset on the back, not allowing the sticky surface to make contact with the wall or surface. The molding surrounding the adhesive tape extrudes beyond the contact area. Even with substantial force to make contact and distorting the container, adhesion is impossible. Unbelievable that those design flaw has not been addressed. The older model was flat surfaced and the adhesive solid. Going cheap in production just embarrassed Terro. What a waste of $20 and my time, the bait traps cannot be mounted.
Tried this, it’s really easy to use. Put the bait out in the morning, and by afternoon already seen less ants. By the afternoon of the next day, seen only two ants. By the third day did not see any more. How a week later still no ants.
Why did you thicken it? Wasted money on two bottles. It dries in 4-6 hours. I tried to lodge my complaint to company by phone several months ago. The agent sent me a free bottle, (seriously questioned my technique), but his bottle didn’t work either. Has quality control noted the formula change?
I want to recommend it as soon as
It reverts back to its original highly effective formula.
This stuff used to work really well, but not anymore. I’ve been using it for a week straight and there are as many ants as I started with. I feel like I’m just feeding them. Soooo disappointing.
Using the Liquid Ant Bait tubes. This stuff is great, I open a tube and set it down near where I had seen ants, within 5 minutes the ant were covering up the plastic tube, it really attracts them fast, hopefully in a couple of days they will be all gone.
The liquid bait consists of borax, sugar, and water. We recommend keeping the bait out of reach of curious kitties. Any medical concerns should be directed to a veteranarian.
Answer by: Woodstream (Admin) on Jul 13, 2021, 8:00 PM
Terro liquid seems to harden over night. Does it need to be replaced daily?
Question by: Tom Maloney on Apr 23, 2024, 12:07 PM
Bait should be replaced once it has hardened. How quickly this occurs is dependent on environmental conditions.
Is there an expiration date on the bait? I can't find one on the box. Thanks!
Question by: Larry Stolte on May 8, 2023, 1:25 PM
As long as the bait is liquid, it will be active. We do recommend replacing it after two years to keep it fresh.
Answer by: Susan (Admin) on May 9, 2023, 11:38 AM
Great product! After 5 days I still have a few ants looking around should I put out more bait? Thanks
Question by: Suellen on Jul 1, 2025, 3:30 PM
Thank you very much for contacting us.
We’re glad to hear the product is working for you! If you’re still seeing some ants after 5 days, it’s best to continue monitoring the bait stations and only add more if the bait has dried out, hardened, or become inaccessible to the ants.
Answer by: Karla (Admin) on Jul 1, 2025, 3:49 PM
Is the ant killer harmful to a human if it gets on the skin.
Question by: Robert Armitage on Sep 26, 2017, 8:00 PM
If this product comes in contact with skin, we recommend washing the area with soap and water thoroughly.
Answer by: Woodstream (Admin) on Sep 27, 2017, 8:00 PM
