Virbac Knockout Area Treatment Spray, 14-oz can

By Virbac
Rated 4.2655 out of 5 stars
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About This Item

  • Aerosol home treatment spray containing synthetic pyrethroids that quickly kills adult and larval fleas and ticks.
  • Prevents subsequent flea infestations for up to 4 months.
  • Contains pyriproxyfen, an Insect Growth Regulator that inhibits flea growth and kills fleas before they reach the adult biting stage.
  • Area treatment that covers 2,000 square feet.
  • Veterinarian recommended. Safe, effective, and powerful treatment of flea and tick infestation.
Play Video: Learn More About Virbac From Our Team of Experts
Learn More About Virbac From Our Team of Experts

Important Information

Fleas rise to the top of your pet's coat as they die, so consider it a triumph if you start seeing more fleas at first, after treating your pet. If you’re still seeing fleas after application, it may be because your pet has picked up new fleas from the environment, which may include other pets, surfaces and outdoor areas. It may take up to 30 days to break the entire flea life cycle. Additionally, you should also treat sources of new fleas (i.e., carpet, yard, etc.) to ensure complete flea control.



About Virbac Dog Pest Protection

Pest Protection

External parasites can be a nuisance to your dog. Use Virbac's topical product for convenient, quick-acting, long-lasting, effective control of fleas and ticks. Kills adult fleas for up to one month and prevents flea eggs from hatching or developing into larvae or adult stages for up to 3 months. Do not use on dogs less than 8 weeks of age. Do not use on cats.

Team Up Against Parasites

Every dog, everywhere deserves affordable year-round parasite protection. IVERHART MAX® (ivermectin/pyrantel pamoate/praziquantel) Soft Chew offers broad coverage with protection against heartworms, roundworms, hookworms and tapeworms. A proven formula with active ingredients recommend by veterinarians for years, IVERHART MAX Soft Chew is bacon-flavored; a soft chew that your dog will love. Important Safety Information for IVERHART MAX ® (ivermectin/pyrantel pamoate/praziquantel) Soft Chew: All dogs should be tested for existing heartworm infection before starting treatment with IVERHART MAX Soft Chew. Use with caution in sick, debilitated, or underweight dogs weighing less than 10 lbs. Gastrointestinal and neurological signs, such as convulsions, have been reported following the use of ivermectin products. For complete product information, refer to the product insert.

Protect Your Home

Not only are there solutions to help control parasites on your dog, but Virbac also has a solution for your home. KNOCKOUT® Area Treatment kills adult fleas and ticks and controls pre-adult fleas (Larvae) for 120 days. For indoor use only. For use in homes and residential use sites. Not for use in commercial or industrial buildings.

About Virbac

Founded in 1968 by a French veterinarian, Virbac is an independent pharmaceutical laboratory dedicated to animal health. For fifty years, the company has built a personalized relationship with veterinarians. Through this partnership, Virbac contributes, day after day, to shape the future of animal health.
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Top IngredientsDeionized Water, Essential Oils Of Cedarwood, Peppermint...Peppermint Oil 0.60%, Eugenol (Clove Extract) 1.40%, Sodium Lauryl Sulfate 3.45%...
Health FeatureAnti-Parasitic, Skin & Coat Health, Vitamins & Minerals, Pest Control

Questions & Answers

23 Customer Questions


Can I use this on mattresses that people sleep on including children?
Answer by ChewySep 28, 2018
This can be used on all surfaces of upholstered furniture, but it's recommended to avoid spraying to the point of wetting as this can be dangerous - a fine mist or spray applied uniformly is all that is necessary to kill fleas and ticks.

What surfaces should be treated? Is it for all (hard and soft) surfaces or is this primarily intended for rugs, carpets, bedding, and draperies?
Answer by ChewyJan 22, 2018
You can use this spray on both soft and hard surfaces. A fine mist or spray applied uniformly is all that is necessary to kill fleas and ticks.

Would this work for bed bugs?
Answer by ChewyJun 07, 2018
This spray is great for clearing fleas, ticks, bed bugs, ants and other unwanted insects.

Do i need to vacumn after the spray drys
Answer by ChewyJul 08, 2018
Once the product has dried, vacuuming is recommended.


ReviewsWrite a Review

4.3
Rated 4.2655 out of 5 stars
113 Reviews
88%
Would recommend to a friend
1
7.9646
8%
2
7.0796
7%
3
4.4248
4%
4
11.5044
12%
5
69.0265
69%

113 Customer Reviews



Rated 5 out of 5 stars
By Roxanne on Sep 15, 2022

3 large dogs !!

Suggested by a friend and she nailed it!! Vacuumed the house then sprayed and vacuumed again later after it dried. I’ll use this product in the beginning of summer and again at the end of summer. With 3 dogs it was hard to get rid of fleas. One can I can do my large living room, bedroom and a hallway. Do it… do it!


Rated 5 out of 5 stars
By Norton on Aug 5, 2022

This stuff works

Wasn't sure at first, but after a few days saw results! This in combination with raid flea and carpet did the job! Spaced about 10 days apart. Also treated pets. So successful! Will do one more treatment with knockout lightly.


Rated 2 out of 5 stars
By appyshoer on Jun 9, 2022

Knockout down for the count

I live on a farm. My cats and dog have access to all the 43 acres plus creekbeds. Bought knockout because of past experience with the product. Sprayed bedrooms living room and all furniture. It did not even kill off the adult fleas. I am disappointed that I wasted my money but even more that I still have fleas attacking me. I am going to be buying a strong vacuum cleaner and use it frequently to such up the fleas and eggs and larvae. I will alas keep searching for a worthwhile product to aid in the battle against fleas.


Rated 5 out of 5 stars
By Jess on Jun 3, 2022

This works if you know what you’re doing

I had a horrible flea infection years ago from cats. I bought $150 worth of this stuff and if you know what you’re doing & know how to clean, it works. I don’t go light on the spray, vacuum! Everything that’s material, clothing, has to be washed, what can’t be washed has to be sealed/bagged up for couple weeks. Treat fleas, lice, all same way, if your extensive it instantly works. My child is allergic to all and any bug bites. I didn’t buy this from chewy, but I ran across it and reading all these awful reviews, clearly not correct and a operational error not the product. Hopefully this helps somebody.


Rated 4 out of 5 stars
By Cynthia on Apr 11, 2022

Very Effective, but not perfect

After finding a flea outbreak in just one room of my home, I shut it off completely from my cats (including wedging towels under the door cracks!) and then proceeded to treat that room to get rid of the fleas. I chose this product as it doesn't contain cypermethrin, which can be very toxic for cats. The Virbac Knockout Area Treatment Spray worked well, but not perfectly, as I've had to re-spray that room more than once over the course of two weeks. My experience: buy more than one can so you have it on hand to re-treat as needed. Also, I'm using a couple flea light traps in that room that attract and kill any hold-out fleas that aren't killed by the spray. Making huge progress and seeing far fewer fleas in that room, but can't say yet that they are 100% gone yet, so I persist!


Rated 5 out of 5 stars
By Kare on Jun 16, 2022

Works and lasts

I have used this product multiple times throughout the years and find that it works quite well. I also spray the baseboards in early spring and find that has kept my home flea and tick free.


Rated 2 out of 5 stars
By Patty on Nov 21, 2021

Wasn't impressed

I wasn't impressed with this. I still have fleas . We have spent so much money on flea treatments it's horrible. We try to catch the problem before it gets out of hand but this didn't help.


Rated 1 out of 5 stars
By Pumpernickel on Nov 11, 2021

Didn’t work for me.

Sprayed 2 small rooms where fleas were present, 3 times. Let dry. Followed all spraying instructions. Fleas still present. Waste of $26.


Rated 5 out of 5 stars
By HappyCustomer on Oct 7, 2021

Does What it Says It Will Do

Super product. Follow the directions, wear a mask, do not saturate surfaces, let dry. Vacuum. Repeat in 3 weeks. Stops the growth cycle. No more fleas. Perfect.


Rated 3 out of 5 stars
By ldk1558 on Dec 16, 2021

Carpet tretment

Not sure this totally worked as I thought it would