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
Review RateWater base Terro Ant spray is junk.
I absolutely hate the water base Terro Ant spray, it is a waste of money and time using; does not work but for a few hours, you need to take off the market. The oil base still works pretty good, but not as good as years past. Why is that?Response From Terro®Kathryn : Consumer Relations Representative
This product is effective long after the product has dried. Ants will die within 24-48 hours of coming in contact with the treated area. We appreciate your feedback and have shared these comments with our Product Managers. Please contact our Consumer Relations Team at 1-844-837-7644 for assistance, we're happy to help.
Review RateNot so happy with Outdoor Terro
I used the Outdoor spray, I did not see ants for a few days but now I see them again. I am not happy with the outdoor. I will keep observing my second can and see if I see any difference. The can emptiest very fast, does not give much product for the money,.Response From Terro®Kathryn : Consumer Relations Representative
This product is effective after application, and ants that come in contact with the treated area will still die withing 24-48 hours. We appreciate your feedback and have shared your comments with our Product Managers. This product is covered by our 30-day guarantee and a 1-year replacement policy. Please contact our Consumer Relations Team at 1-844-837-7644 for assistance, we're happy to help.
Review RateGREAT PRODUCT! WORKS MIRACLES!!!
Tero Outdoor Ant Killer (& all their ant products) are FABULOUS!! I live in an area (Bay Ridge, Brooklyn) that is loaded with tiny brown ants. Any home owner can tell you of their battles with these persistent little critters. For years, I couldn't keep my kitchen window open at night due to the risk of them coming in (one evening I found a trail from window, across kitchen to my pantry) and my upstairs tenant had the same issue. Tero was recommended by my exterminator brother and it is the ONLY product that has kept the ants at bay. Thank God for Tero!!
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?
- 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.