Keep ants from entering your house with TERRO® Outdoor Ant Killer. Our best outdoor ant killer provides instant knockdown and long-term control against ants and other unwanted home invaders. An easy-to-use, precision spray tube allows you to deliver barrier spray in hard-to-reach places up to 10-15 feet away. When sprayed, the outdoor ant killer expands upon hitting the surface and leaves an invisible residual deposit.
TERRO® Outdoor Ant Killer is ideal as a perimeter barrier around foundations, doors and windows. It is especially useful outside in early spring when ants emerge and attempt to enter the house. Use again in the fall when ants attempt to come inside for the winter.
General Usage Tips for Killing Ants Outdoors
Follow these tips:
- Direct your application to foraging trails and other areas that ants and other insects use as common entry points.
- Spray with caution when wind conditions may create a mist that may blow back to you.
- Use the attached extension tube or the spare — when engaged, spray will shoot out a stream 10 to 15 feet long.
- Look for ant activity around the outside of the house and spray the outdoor surface areas, spraying as many ants as possible.
- Do not apply this product in or around bodies of water.
Where to Use
Ants: Use this outdoor ant spray in key areas outside the house, where you suspect ants are entering the structure, such as around downspouts and gutters, near windowsills and door openings. Spray ants directly where possible. Seal up any visible exterior cracks where ants can be seen entering the home. Apply the outside ant killer on ant trails, hills, ant mounds and other areas of entry and infestation.
Carpenter Ants: Carpenter ants usually come from an outside colony and enter your house looking to establish a satellite colony in an area containing water-damaged wood. Carpenter ants are easy to identify because they are larger than all other pest ants. Often you will find them living in wood that has been in contact with water, such as around downspouts and gutters, near windowsills and door openings, close to leaking water pipes, or around decks.
Carpenter ants are most active between dusk and dawn — locate their outside trails during this time. Carpenter ants follow distinct trails such as edges of landscape timbers, along the ground close to outside walls, near downspouts or along the edge of an outside wall. After a careful inspection around the outside of the house, apply TERRO® Outdoor Ant Killer. Outdoor application should include all areas where you suspect ants are entering the home. Seal any visible exterior cracks where ants can be seen entering the home. If ants are discovered inside the home, use a suitable TERRO® indoor ant control product to treat the indoor invasion. If you find the main colony outside in the yard, use the outdoor ant killer spray on the areas where ants are seen entering the main colony.
Spiders: Spray directly on spiders and webs.
Other crawling insects: To control cockroaches, boxelder bugs, crickets, sowbugs and multicolored Asian lady beetles, focus your treatment in key areas outside your house where you suspect these insects are entering. Check downspouts and gutters, near windowsills and door openings. Spray insects directly, where possible, and seal up any visible exterior cracks where crawling insects can be seen entering the home.
View video on how to effectively control outdoor ant invasions:
- Provides rapid knockdown and effective long-term control
- Also effective against carpenter ants, carpenter bees, Asian lady beetles, boxelder bugs, spiders, cockroaches and other pests
- Sprays 10 to 15 feet
- Easy to spray into hard-to-reach places
- For outdoor use only
What’s in the Box
- One 1 lb 3 oz aerosol spray can
- Extension tube
- Contains Permethrin* (0.200%), related reaction products (0.017%), Tetramethrin (0.200%) and other ingredients (99.583%)
- 1 lb 3 oz aerosol spray can
- For outdoor use only
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
Very disappointing. I have used a few of these cans and although the spray will kill the ants it doesn't seem to last even a day at times. After I spray the ants will be back either later that day after the spray has dried or the next morning in full force. It does not kill the ants or stop them near as long as they say on the can unfortunately.
Review RateSpray really didn't....
I have purchased other Terro products but this didn't work for me. I read the directions and began trying to spray. This product was a pain to use. The product didn't spray unless you used all your strength to keep the button pushed down. Constant shaking of the can was a pain. More spitting than spraying. A real waste of time.Response From Terro®Kathryn : Consumer Relations Representative
We are sorry to hear about this experience! The feedback you have shared has been given to our Product Managers. This product is covered by a 30-day guarantee and a 1-year warranty with a copy of the purchase receipt. Please feel free to contact our Consumer Relations Team at 1-800-800-1819 x 458 with any questions. We are happy to help!
Review RateAwful packaging and tiny instructions
I have been using Terro ant spray for around 20 years and I am very disappointed with the packaging of this product. The sprayer is just weird. I thought the flimsy blue piece was some sort of safety, so I popped it off (it came off easily). Then I realized I had messed it up. 20 minutes later, I got it back together and it more or less works. But why bother?? A simple push-on-top button and a tube taped to the can would have been fine. Also, the microscopic instructions are very annoying.Response From Terro®Jennifer : Consumer Relations Representative
The time taken to provide this feedback is appreciated! We are sorry to hear this product did not meet your expectations. This information is helpful to us and has been shared with our Product Managers.
Please feel free to contact our Consumer Relations Team at 800-800-1819 x 458 with any questions or for additional assistance.
Review RateBuy something else
I tried the ant bait traps, They did NOTHING. I need to spray my deck with something that works, just wasting money on these products.Response From Terro®Jennifer : Consumer Relations Representative
Thank you for providing this feedback! We are sorry to hear the desired results were not seen and would like to learn more about what occurred. For further assistance, please feel free to contact us directly. Our Consumer Relations Team can be reached at 800-800-1819 x 458. We are happy to help and would like to make this right!
Review RateSimply the BEST!
I have been using Terro Ant Killer products for years and every time the ants appear all I need to do is put out the Terro liquid or spray the outside of my home with the aerosol spray and like magic the ants are no longer a problem. I tell all my family and friend about the Terro products. Five Stars!!!
Review RateMultiple uses
BEST insect spray on the market! I live in Florida and it not only kills ants around the outside of the house, but I also spray it up in the corners of my 18' high ceiling over my front porch to keep the dirt daubers away...works great!
Review RateGreat product, residual effect was good.
My opinion, an excellent product. We purchased this item years ago. We were having a huge ant problem both flying and smaller ones. After seeing some in the rain gutter, sprayed it with Terro Outdoor Ant killer. The next evening huge invasion of flying ants, looked in the gutter and so many dead flying ants, so the Terro was still working to my amazement and delight. I should have tried it sooner. I hope the newer can has the same ingredients and amounts as the old can we had. Can it be purchased locally?
Review RateDirections are impossible to read
I purchased 4 cans of the ant spray, 3 for outside, 1 for inside...I tried to read the directions on the side of the can, I used 2 pairs of glasses and a magnifying glass, and still couldn't see the printing...I then saw the tab that said to snap off, to which I did, then tried to insert the pronged piece, it didn't fit, not any way that I tried...I gave up, and I called your company and explained the situation to a representative... she tried her best to explain how to put this together, but I...once again, couldn't do it...she was kind enough to send me a new can, this one without the prongs...I've yet to use it! yes! afraid that I'll mess it up again...I am going to have my neighbor look at the can(s) and see if she can put the other cans together...this product must be great, as I've read all comments...but you might consider enclosing directions with large print and pictures.Response From Terro®Patty : Consumer Relations Representative
We apologize for this experience and appreciate the feedback.
The instructions are also available on our website at the link below. This can be downloaded as a PDF file and enlarged as needed.
Please give our Consumer Relations Team a call at 1-800-800-1819 x 458 with additional questions.
Review RateBest Product for removing ants
This is the second year that I have used this product to stop ants from coming into my home. It has done the trick every time! Last year I found this at my local Target store after battling with ants and nothing worked. I purchase it and used it one time and it worked right away. This year at the beginning of spring I went to purchase it again just in case and I could not find it in any store (Target, Lowes, Home Depot, Walmart) No one had it. Then I found it on Terro's website and I ordered it right away. I started having ants again and as soon as I used the product with in a day or two they were gone. Thank you Terro for a great product that is easy to use and works every time!
Review RateProduct killed the ants - spray bottle design seems flawed & dangerous
Just used this product and like the last reviewer, it got all over my hands. I followed the instructions, shook it well, stood back from what I was spraying. There should be something more permanent that directs the spray away from the bottle other than the tiny little red tube that you put in yourself. I followed the instructions on the bottle and rinsed my hands for 20 minutes - I thought coming to your website would give me more information about treatment and reaction symptoms but there's nothing on here. The bottle is a bit unclear - it says call poison control for treatment advice (after it instructs to rinse hands for 15 - 20 minutes). Do you call for treatment only if you have any reaction and what would that reaction be? My hands feel a bit weird, but that's probably because I just had them underwater for 20 minutes. The ants are dead now - hopefully I'm okay.Response From Terro®Patty : Consumer Relations Representative
We appreciate the time taken to provide this feedback and apologize for the experience.
The recommended first aid treatment is, as was correctly done, to rinse the skin immediately with plenty of water for 15 – 20 minutes. For additional treatment advice or concerns, poison control or a medical professional should be contacted.
Please give our Consumer Relations Team a call at 1-800-800-1819 x 458 with additional questions.
- 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.
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 up to 12 weeks. And better yet, these sprays are also effective against cockroaches, spiders, crickets, scorpions and other unwanted insects.