PetLock Max for Dogs
Contains the same active ingredients used in K9 Advantix® II
PetLock Max for Dogs
Choose the Size That’s Right for Your Pet
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PetLock Max is a monthly topical treatment and preventative of ticks, fleas, mosquitoes, biting flies, & lice.

PetLock® Max for Dogs uses the same active ingredients as K9 Advantix II® for Dogs, but sells for a fraction of the cost. PetLock® Max is long-lasting, waterproof, and easy to use. Apply monthly.

Frequency of Application
Under normal conditions the product remains effective for a month. In case of severe pest infestations, retreatment once a week is permitted not to exceed 4 weeks.  After successful pest control, please return to a monthly schedule.
Precautionary Statements


WARNING. Causes substantial but temporary eye injury. Do not get in eyes or on clothing. Harmful if swallowed. Prolonged or frequently repeated skin contact may cause allergic reactions in some individuals. Wash thoroughly with soap and water after handling and before eating, drinking, chewing gum, using tobacco or using the toilet. Remove and wash contaminated clothing before reuse.


For external use on dogs only. Do not use on animals other than dogs. Do not use on dogs or puppies under seven (7) weeks of age or weighing less than [insert lowest weight of weight class] pounds. Do not get this product in dog’s eyes or mouth. As with any product, consult your veterinarian before using this product on debilitated, aged, pregnant or nursing dogs. Individual sensitivities may occur after using ANY pesticide product for dogs. If signs persist, or become more severe, consult a veterinarian immediately. If your dog is on medication, consult your veterinarian before using this or any other product.


This pesticide is extremely toxic to aquatic organisms, including fish and invertebrates. Do not add directly to water. Do not contaminate water when disposing of product or packaging.


Monitor your dog after application. Side effects may include signs of skin irritation such as redness, scratching, or other signs of discomfort. Gastrointestinal signs such as vomiting or diarrhea have also been reported. If these or other side effects (such as lethargy or agitation) occur, consult your veterinarian or call 1-855-844-4375.

Click here for the Safety Data Sheet (SDS).

First Aid

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 eye.
  • 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 the poison control center or doctor.
  • Do not give anything to an unconscious person.

Hotline Number:

Have the product container or label with you when calling a poison control center or doctor, or going for treatment. For medical emergencies call 1-855-844-4375. For consumer questions, call 1-888-846-4231.

Note to Physician:

Treat the patient symptomatically.

DO NOT USE ON CATS – MAY BE FATAL.  Keep cats away from treated dogs for 24 hours. If applied to a cat or ingested by a cat, contact your veterinarian immediately.

Where to Find PetLock® Products
PetLock® is available at Petco stores and other specialty retailers. To find a store near you or to purchase online, click on the link below.
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