PetArmor® Extend™ Flea & Tick Collar

PetArmor® Extend™ Flea & Tick Collar

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Join the millions who have been protecting their pets with PetArmor® for over 15 years! The PetArmor® Extend™ Collar for dogs and cats delivers up to eight months of continuous protection by killing and repelling fleas, ticks, and lice, no prescription needed. It also targets flea larvae, effectively breaking the flea life cycle and preventing the pests from coming back. The PetArmor® Extend™ formula, with vet-recommended active ingredients, is completely odorless and non-greasy, leaving no chemical smell or residue behind. With water-resistant protection that lasts through every season, you can have peace of mind knowing your dog or cat is covered.

  1. What is the PetArmor® Extend™ Flea & Tick Collar for Dogs and what is its protection duration?
    This product is a continual-release flea & tick collar designed to provide 8 months of protection against fleas and ticks when used as directed. The collar also provides protection against chewing lice.
  1. What are the active ingredients and how do they work?
    The pet collar is a dual-active ingredient formulation, containing the active ingredients imidacloprid (insecticide; acts on nicotinic acetylcholine receptors causing rapid paralysis/death in fleas) and flumethrin (synthetic pyrethroid acaricide; interferes with sodium channels causing tick avoidance/repellency, prevents biting, then paralysis/death).
  1. What is the mechanism of action of the PetArmor® Extend™ Flea & Tick Collar for Dogs?
    The collar uses a polymer matrix that slowly and continuously releases the active ingredients (imidacloprid and flumethrin) in low concentrations over 8 months. After release, the active ingredients distribute topically across the skin and hair coat via the pet’s natural lipid layer rather than relying on systemic absorption.
  1. How old should my dog/puppy be to use PetArmor® Extend™?
    The collar can be used on both dogs and puppies, with puppies needing to be at least 7 weeks of age. The PetArmor® Extend™ collar for dogs comes in two sizes for dogs weighing >18 lb and dogs/puppies weighing ≤18 lb.
  1. Is the product systemic? Do fleas and ticks need to bite for the collar to be effective?
    No, the PetArmor® Extend™ collar works through topical application. The active ingredients distribute over the skin/hair coat via the pet’s lipid layer to kill fleas and ticks on contact, no biting needed to be effective.
  1. How long does it take for PetArmor® Extend™ to start working?
    After 24 hours of collar application, reinfesting leas are killed within 2 hours with protection lasting 8 months, killing and repelling fleas.

    For ticks, the prevention of tick reinfestations starts after 48 hours of collar application. It is important to understand that existing ticks on the dog may not be immediately killed upon application of the collar and existing ticks should be removed when applying the collar. After 24 hours of collar application, new ticks are killed after 6 hours.
  1. How does bathing/swimming affect duration?
    The duration of the PetArmor® Extend™ collar maintains its full efficacy duration under normal conditions when exposed to water and the collar does not need to be removed during bathing or if dogs become wet. However, when dogs are bathed/immersed more than once monthly, the frequent water exposure may reduce the duration for tick protection to ~7 months and the duration of flea protection to ~5 months.
  1. What should I do when my dog scratches the collar or skin irritations occur?
    While adverse effects are rare, there is a chance that dogs not used to wearing the PetArmor® Extend™ collar may experience mild reactions, including scratching, redness, and hair loss. While these symptoms typically disappear without removing the collar within a couple of weeks, adverse reactions may be observed. Typical adverse reactions include the following, in order of decreasing reporting frequency: Pruritus, eczema, lethargy, behavioral disorders, application site reactions, anorexia, hyperactivity, muscle tremor, vocalization, convulsion, ataxia.

    If the symptoms persist, remove the collar immediately and consult your veterinarian. Adverse events should be reported to Sergeant’s Pet Care Products, LLC 1-800-781-4738.
  1. What handling and safety counseling is recommended?
    The collar should be kept away from children and children should not be allowed to play with or mouth the collar. The reflector pieces can pose a choking hazard. Avoid contact with eyes/skin/clothing and wash hands after fitting. Ensure a proper fit, which is important to ensure that dogs cannot chew the collar. Don’t attach a leash to the collar. Always consult a veterinarian before use in debilitated/aged/breeding/pregnant/nursing animals.
  1. What is the EPA regulatory status?
    The PetArmor® Extend™ collar for dogs has been approved by the U.S. Environmental Protection Agency (EPA) on June 23, 2025. All efficacy and safety claims were reviewed and approved by the EPA and the PetArmor® Extend™ collar for dogs was assigned the EPA Registration Number 2517-181. The registration issued represents an unconditional time-limited registration expiring July 13, 2028, which is a common type of registration for pet pesticide products and the registration can be extended.
Dogs

1. Unroll the collar and remove any plastic tabs or strips inside. 2. Place the collar around your dog's neck, insert the end through the buckle, and adjust so two fingers fit comfortably between the collar and neck. 3. Pull the extra length through the loop and trim, leaving about 1 inch. For puppies, leave 2-3 inches for growth.


Cats

1. Unroll the collar and remove any plastic tabs or strips inside. 2. Place the collar around your cat's neck, insert the end through the buckle, and adjust so two fingers fit comfortably between the collar and neck. 3. Pull the extra length through the loop and trim, leaving about 1 inch. For kittens, leave 2-3 inches for growth.

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