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KNOCKOUT Room and Area Fogger

This page contains information on KNOCKOUT Room and Area Fogger for veterinary use.
The information provided typically includes the following:
  • KNOCKOUT Room and Area Fogger Indications
  • Warnings and cautions for KNOCKOUT Room and Area Fogger
  • Direction and dosage information for KNOCKOUT Room and Area Fogger

KNOCKOUT Room and Area Fogger

This treatment applies to the following species:
Company: Virbac




Active Ingredients





N-Octyl bicycloheptene dicarboximide*








*MGK® 264 Insecticide Synergist

**Cis/trans isomers ratio: Max. 55% (±) cis and Min. 45% (±) trans

NYLAR and MGK are registered trademarks of McLaughlin Gormley King Company.


KNOCKOUT Room and Area Fogger Caution

One fogger will treat a room up to 27 feet x 27 feet with an 8 foot ceiling.

KNOCKOUT™ Room and Area Fogger contains a combination of three insecticides that stops the flea life cycle in three ways and controls other insects. The first insecticide is pyriproxyfen (NYLAR® Insect Growth Regulator), an insect growth regulator, that will not allow the flea to reproduce, thereby providing long-term control. The second insecticide is the botanical, Pyrethrin, which provides effective quick kill of insects upon direct contact and an added benefit of flushing the insects from their hiding place to aid in a more complete control. Permethrin, the third active insecticide, provides activity until the NYLAR Insect Growth Regulator takes effect. KNOCKOUT Room and Area Fogger contains a combination of ingredients that kills both adult and hatching fleas. NYLAR Insect Growth Regulator continues to kill hatching fleas for 7 months by preventing their development into adults. The fogger reaches fleas (and other insects) hidden in carpets, rugs, draperies, upholstery, pet bedding, floor cracks and open cabinets. Occasionally, adult fleas may be present in treated areas when reintroduced from infested animals.

Directions For Use

It is a violation of Federal law to use this product in a manner inconsistent with its labeling. Does not control bed bugs. For use only when building has been vacated by human beings and pets. Ventilate treated area for two (2) hours before re-entry. For best results, treat all infested areas. One fogger will treat a room up to 27 feet by 27 feet with an 8 foot ceiling. Use additional units for remote rooms or where the free flow of fog is not assured.

To Use This Product Correctly: DO NOT use more than one fogger per room. DO NOT use in small, enclosed spaces such as closets, cabinets or under counters or tables. Use of a fogger in an enclosed space may cause the product to explode, resulting in injury to people or damage to property. DO NOT use in a room 5 feet x 5 feet or smaller; instead, allow fog to enter from other rooms. Turn off ALL ignition sources such as pilot lights (shut off gas valves), other open flames or running electrical appliances that cycle off and on (i.e., refrigerators, thermostats, etc.). Call your gas utility or management company if you need assistance with your pilot lights.

Before You Fog: Remove or cover exposed food and drinking water before application. Remove or cover dishes, utensils, food processing equipment, and food preparation surfaces or wash them before use. Shut off fans and air conditioners. Put out all flames and pilot lights. Close outside doors and windows. Remove pets and birds but leave pet’s bedding, as this is a primary hiding place for fleas and must be treated for best results. No need to discard pet’s bedding after treatment. Cover or remove fish tanks and bowls. Leave rugs, draperies, and upholstered furniture in place. This product will not harm furniture when used as directed. Open interior closet doors and cabinets or areas to be treated. Cover waxed furniture and wood floors in the immediate area surrounding the fogger. For more effective control of storage pests and cockroaches, open all cupboard doors and drawers for better penetration of fog. Remove all infested foodstuffs and dispose of in outdoor trash. For flea and tick control, thoroughly vacuum all carpeting, upholstered furniture, along baseboards, under furniture and in closets. Put vacuum bag into a sack and dispose of in outside trash. Mop all hard floor surfaces.

READ ALL DIRECTIONS AND CAUTIONS BEFORE USING: TO START FOGGING, SHAKE FOGGER WELL BEFORE USING. Hold can at arm’s length with top of can pointing away from face and eyes. Push down on finger pad until it locks. This will start fogging action. Set canister in an upright position on a table, stand, etc. (up to 30” in height in the center of the area) and place several thicknesses of newspaper under the canister to prevent marring of the surface. Treat the whole dwelling, using multiple units in homes with more than one level and numerous rooms. VACATE THE HOME IMMEDIATELY.

DO NOT RE-ENTER THE BUILDING FOR TWO HOURS. Airing Out: Wait two (2) hours after application, then open windows, vents and doors for two (2) hours. If an odor is still detected, additional ventilation is required. If additional units are used for remote rooms or where free flow of fog is not assured, increase airing-out time accordingly. Do not allow adults, children, or pets to enter until vapors, mists, and aerosols have dispersed, and the treated area has been thoroughly ventilated.

STORAGE AND DISPOSAL: Do not contaminate water, food, or feed by storage and disposal. Pesticide Storage: Store in a cool, dry place inaccessible to children and away from heat and open flame. Store away from food and pet food.

Pesticide Disposal and Container Handling: Do not puncture or incinerate! If empty: Place in trash or offer for recycling, if available. If partly filled: Call your local solid waste agency for disposal instructions.



KNOCKOUT Room and Area Fogger Caution

HAZARDS TO HUMANS: Harmful if absorbed through skin. Avoid contact with skin or clothing. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco, or using the toilet.


If on Skin or Clothing: Take off contaminated clothing. Rinse skin immediately with plenty of water for 15-20 minutes. Call a Poison Control Center or doctor for treatment advice.

If in Eyes: Hold eye open and rinse slowly and gently with water for 15-20 minutes. Remove contact lenses, if present, after the first 5 minutes, then continue rinsing eyes. Call a Poison Control Center or doctor for treatment advice.

If Swallowed: Call a Poison Control Center or doctor immediately for treatment advice. Have person sip a glass of water if able to swallow. Do not induce vomiting unless told to do so by a Poison Control Center or doctor. Do not give anything by mouth to an unconscious person.

If Inhaled: Move person to fresh air. If person is not breathing, call 911 or an ambulance, then give artificial respiration, preferably by mouth-to-mouth, if possible. Call a Poison Control Center or doctor for further treatment advice.

HOT LINE NUMBER: Have the product container or label with you when calling a Poison Control Center or doctor, or going for treatment. You may also contact 1-800-345-4735 for emergency medical treatment information.

PHYSICAL AND CHEMICAL HAZARDS: Contents under pressure. Keep away from heat, sparks and open flame. Do not puncture or incinerate container. Exposure to temperatures above 130°F may cause bursting.

Highly Flammable Ingredient

Ingrediente Altamente Inflamable

Lot No. printed on container.

EPA Reg. No. 2382-184

EPA Est. No. 47000-IA-1

Manufactured for: Virbac AH, Inc., PO Box 162059, Fort Worth, Texas 76161

(800) 338-3659

6 OZ. (170 g)

8/30/12 253452-08

NAC No.: 10230652

Virbac Corporation

P.O. BOX 162059, FORT WORTH, TX, 76161
Telephone:   817-831-5030
Order Desk:   800-338-3659
Fax:   817-831-8327
Every effort has been made to ensure the accuracy of the KNOCKOUT Room and Area Fogger information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2019 Animalytix LLC. Updated: 2019-09-30