TERRO® Ant Killer Spray

Model #: T401-6

24 reviews
0 5 4.4
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  • Kills ants, cockroaches, crickets, scorpions, spiders, and other insects
  • Kills on contact and continues to kill for up to 6 weeks
  • Use as a spot treatment and in cracks and crevices
  • 16 oz aerosol can with twist-to-open top
  • For indoor and outdoor use

Cannot Ship To: AK, HI, PR
Best used for
Near Entry Points
Near Entry Points
Along Baseboards
Along Baseboards
Cracks and Crevices
Cracks & Crevices
Storage Areas
Storage Areas
TERRO® Ant Killer Spray

Rid your home of ant invasions withTERRO® Ant Killer Spray. This 16 oz aerosol spray kills ants on contact, and it keeps working for weeks after the initial application. Whether Ant Killer Spray is used inside as a deterrent or outside to control the pest population, it can protect against ants, spiders, cockroaches, and other unwanted insects.

ant killer spray
Protection Made Simple
Pest Protection Made Simple Thanks to its convenient spray nozzle, Ant Killer Spray is an easy-to-use ant treatment. For best results, aim the can in a slightly downward direction. Make sure the spray is facing away from you before depressing the nozzle. For effective pest reduction, apply Ant Killer Spray directly to pests.
Use Indoors and Outdoors

Ant Killer Spray can be used indoors to eliminate pests from common hiding places, such as storage areas, sinks, plumbing, baseboards, and drains. To eliminate the existing ant population and prevent reinfestation, use the spray to treat cracks, crevices, and any potential entry points. It can also be used as a spot treatment. For outdoor use, apply the spray in wind-free conditions to increase accuracy.

How to Use
Protects Against Pests
Protects Against Pests Ant Killer spray kills ants on contact and continues to kill them for up to 6 weeks. The spray can also protect against scorpions, crickets, spiders, cockroaches, silverfish, centipedes, and Asian lady beetles.
Five Stars "I always recommend this to anyone having an ant problem. It is the best product out there." Read More Reviews »
TERRO® Ant Killer Spray Product Details Do you want to know more helpful details about the TERRO® Ant Killer Spray? Take a closer look at the in-depth specifications for this product. Complete Product Details »
Model # T401-6
Eliminates Ants, Asian lady bird beetles, black widow spiders, cockroaches, crickets, fleas, scorpions, silverfish, and waterbugs
Recommended Use Place around the home against baseboards, in corners, and behind doors and or furniture
Includes One 16 oz aerosol spray can
Learn More About Ants

TERRO® has a wide variety of helpful articles to guide you in your efforts to get rid of the pest insects in your home or business. Check these relevant resources to assist you in your pest control efforts.

About TERRO® For more than a century, TERRO® has been the trusted name in insect control. Our innovative products are the gold standard in home ant control and beyond. Look for our bright orange packaging on a variety of products, including liquid ant killer, aerosol sprays, perimeter treatments and other products for your home and business. More About TERRO®»

Model # T401-6
Includes One 16 oz aerosol spray can
  • Ants
  • Asian lady bird beetles
  • Black widow spiders
  • Cockroaches
  • Crickets
  • Fleas
  • Scorpions
  • Silverfish
  • Waterbugs
  • Kills ants, cockroaches, crickets, scorpions, spiders and other insects
  • Contact killing spray that continues to kill for up to 6 weeks
  • Use as a spot treatment and in cracks and crevices
  • For indoor and outdoor use
Recommended Use Use around baseboards, in attics, basements, campers, household storage areas, garages, cabins, etc.
Ingredients Active Ingredients (0.38%):
  • Prallethrin {(RS)-2-Methyl-4-oxo-3-(2-propynyl) cyclopent-2-enyl (1RS)-cis, trans-chrysanthemate}(0.03%)
  • Esfenvalerate [(S)-Cyano (3-phenoxyphenyl) methyl 4-chloro-alpha-(1-methylethyl) benzeneacetate] (0.05%)
  • N-Octyl bicycloheptene dicarboximide (0.30%)
  • Other Ingredients (99.62%)

Disclaimer: Terro.com 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 swww.terro.com
May 21, 2020
Excellent results By Sunnnie1
We used Terro last year and was very pleased with the results. When I went to purchase it. This year, I could not find it. I went to their website and was very pleased that I could purchase it from them directly. And, getting it with free shipping was outstanding. I ordered extra and it arrived quickly. I am happy.
Review Rate
Review posted on swww.terro.com
July 23, 2019
DID THE JOB!!!!!!! By David

It took a LITTLE more than I was expecting. BUT, once I got the hang of how much would be needed at each area I need to spray it DID THE JOB!!!!!!! I am MORE than happy with the results!!! Thank You for this product and its ability to DO the job!!!!! David.

Review Rate
Review posted on swww.terro.com
January 21, 2019
When tiny ants come indoors, this is the product we always reach for. By Ken

I am surprised some reviewers have not had success with Terro products. This is the spray we always reach for when those tiny Pharaoh ants (sometimes called Sugar ants), come inside our house. We use the spray whenever there's an invasion of them. Once in a while we get lucky and discover their nest. It kills them dead instantly. When we find just one or two of the tiny creatures we know they are "scouts" and we we will follow their route if possible, putting a few drops of the Terro liquid bait down along the way. The scouts will go back to the nest and alert the others, who will follow them to the bait. As many as a hundred ants will devour the bait and take it back to the nest to feed the queen and the larvae, quickly killing the entire colony. Ants are always on the move, so be sure to keep stocked with Terro just in case another colony moves in after several weeks.

Review Rate
Review posted on swww.terro.com
August 16, 2018
Waiting to see if this works.... By peter

I called in today to register my thoughts that there are no instructions on the can about what to do if you get some of the fluid on your skin or inhale the spray. I think these hazmat warnings should be right on the can, in legible print. I also second the remarks of others that a nozzle should be provided so that one can better aim the spray into cracks and holes.The ants I am trying to get rid of are embedded in wood. Not sure a spray will do the job, but am willing to try. Lets hope I have some results.

Review Rate
Review posted on swww.terro.com
September 1, 2017
Worthless. Doesn't work By Kim

Worthless!! I bought a can and sprayed around ant trails in the house. Killed a couple of ants who unlucky enough to be present, but the next day they were back in numbers right where I sprayed. Sprayed again, and the ants were back the next day. The only way this stuff will kill ants is if you squash them with the can... :(

Response From Terro®
Patty : Consumer Relations Representative

Hello Kim,

We apologize for this experience and would like the opportunity to learn more.  

This product is a contact killer that will begin to affect the ants as soon as they come in contact with it. The residual effect lasts up to 6 weeks.  Please give our Consumer Relations Team a call at 1-800-800-1819 x 458 so we can better understand the situation and provide assistance.

Review Rate
Review posted on swww.terro.com
July 13, 2017

Yea, this stuff is the best. My family moved into an old farm house that was built in 1910. Plenty of time for ants to build nests in walls and under the house. We tried EVERYTHING. I heard terro was the best from a pest guy, and bought the liquid ant traps. They certainly drew in ants, but I think the size of the infestation made no difference if a few colonies got wiped out. Ants were everywhere. On my computer desk, bedrooms, kitchen, bathroom...everywhere. Its not like we are slobs either. These ants were seeking warm electronics, and cook books that may have had drips of residue from messy recipes, water sources, and just randomly showing up. Ant motels didn't work. Perimeter granules didn't work. Clove and cinnamon hippy mixtures didn't work. It got to the point where everything went into ziplock bags and we just expected to have to kill hundreds of ants on countertops every morning. Nothing was safe to even set down. The final straw was when I was on the couch and felt ants crawling up my arm. I got the heebies and decided to go mow the lawn. While weed whacking, I stepped in an ant hill and had ants crawling up my leg. I snapped. Drove to a mom and pop hardware store where they had this spray. I sprayed the problem areas and to my amazement the next morning, no ants. I've gone through and kept spraying new areas where they inevitably pop up. After about a week of that, there are no ants. I am so satisfied with this product.

Review Rate
Review posted on swww.terro.com
June 12, 2017
Good product By Phyllis

had purchased Terro ant spray before and satisfied with product. Purchased more online, as could not locate spray in stores. It works very well in my opinion and have frequently recommended to family/friends. The only thing the spray did not/could not do was eradicate ant hills in the yard...after several spray treatments, we ended up purchasing and using Terro granuals to get rid of the enormous ant hills in our yard instead and that's taken care of the ant hills.

Review Rate
Review posted on swww.terro.com
October 8, 2016
Terro evaluation By DBooker4314
I rated the Terro good because it works so well, at least I think it does. The container that we received had no instructions on what we should do to make it work, by detaching the the blue tab. Had to phone in for instructions as to what to do. Should make it easier to understand.
Review Rate
Review posted on swww.terro.com
September 19, 2016
excellent product By sherrycam
I always recommend this to any one having an ant problem. It is the best product out there.
Review Rate
Review posted on swww.terro.com
August 23, 2016
Do not spray directly onto insects By MonicaPrz

I'm pretty surprised no one in the reviews mentions any negatives. While this product is great for spraying edges, it doesn't prove so when spraying directly onto insects/ ants or crevices. Its aerosol can has so much pressure or air that when you spray it, it sends the bugs flying. You literally need to get up close enough to whatever you are spraying as it does not come out in a stream like other brands. This can also be a problem if you're spraying crevices as it does not get directly into cracks; spraying only the outside as the high amount of pressure sends the product into the air. This was no defected can as I bought 2 and both sprayed the same. Negatives aside, it does work up to several weeks.

Response From Terro®
Patty : Consumer Relations Representative

Hello Monica, We appreciate the time taken to provide this feedback and apologize for the experience. Our product team always looks for possible product improvements and consumer feedback is important. This product is designed to be applied as a coarse spray and surfaces should be sprayed until wet. Please contact our Consumer Relations Team at 1-800-800-1819 x 458 for additional assistance.

Read All Reviews (24) Write a Review
Q.During an ant infestation this was accidentally sprayed on carpeted areas where is a lot of foot traffic. Is there a residue that remains after the spray dries? Would it be recommended to clean this carpeted area since we often step there barefoot?

This product will continue to be effective in the areas in which it was sprayed for up to 6 weeks. We recommend cleaning the carpet area.

Q.Is this product safe to spray on flowering trees ?

We do not recommend spraying this product on flowering trees.

Q.Can sprayed surfaces be wiped down with a damp rag after the Terro has dried? If so, will the Terro have any residual effect on ants?

The treated area does not need to be wiped down after it has been sprayed, however, you may use soap and water to clean the product. This product will have a residual effect once it is applied, but we recommend reapplying if it has been wiped down.

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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.

I need to knock out an ant invasion quickly – what do you recommend?

We suggest using TERRO® Ant Killer Spray or TERRO® Outdoor Ant Spray - both products kill on contact and will continue killing for 6-12 weeks. And better yet, these sprays are also effective against cockroaches, spiders, crickets, scorpions and other unwanted insects.

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