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Seresto Dog Collar For Large Dogs (over 18 lbs) 27.5 inch (70 cm)

4.8/5 (279 Reviews)
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  • Information
  • Directions
  • Safety
  • Benefits
  • Seresto Dog Collar FAQ
Information
Seresto Dog Collar
  • Pet
    Dog
  • Treatment For
    Flea and Tick
  • Health Benefits
    External Parasites
  • Product Type
    Collar
  • Parasites Covered
    Flea and Tick
  • Protects For
    8 Months
  • Recommended For
    Dogs Older than 8 Weeks
  • Key Ingredients
    Flumethrin, Imidacloprid

Seresto Dog Collar For Large Dogs (Over 18 lbs) 27.5 inch (70 cm)

Seresto Collar for Large Dogs is a long-lasting treatment for your furry friend's protection from the most common external parasites, including fleas and ticks. It features a unique polymer matrix technology that allows the controlled release of the active ingredients, imidacloprid and flumethrin, over an extended period for continuous protection. This helps protect your dog from flea and tick infestations for 8 months.

This dog flea and tick collar kills and repels parasites through contact, eliminating the need for painful bites. Seresto collar for over 18 lbs dogs is non-greasy, odorless and water-resistant. It remains effective even after a shampoo treatment, swimming or exposure to rain. Seresto is the #1 vet-recommended flea and tick collar according to Elanco USA and is trusted by dog parents.

Suitable For

Seresto Collar for large dogs is suitable for puppies and dogs from 7 weeks of age, weighing over 18 lbs.

Active Ingredients

Imidacloprid 10%, Flumethrin 4.5%

Ingredients: Flumethrin, Imidacloprid

Directions
How to Use Seresto Dog Collar

  • Just before use, remove the Seresto collar from the protective bag.
  • Unroll the collar and ensure no remnants from the plastic connectors are left inside the collar.
  • Insert the end of the collar through the buckle.
  • Adjust the collar around your dog's neck.
  • To ensure the collar is not too tight or too loose, leave a gap of two fingers between the collar and the dog's neck.
  • Pull the excess part of the collar through the loop(s). Cut the excess length, leaving about 1 inch (2 cm) beyond the loops.
  • Do not cut the excess length when using it on a growing puppy.
  • Check the collar periodically and adjust if needed.
  • Make your dog wear the collar continuously for uninterrupted protection and replace it with a new collar every 8 months.
  • It is designed with a release mechanism. Though unlikely, if your dog is trapped, the dog's own strength is sufficient to widen and quickly release the collar.

The table below shows the available packs of Seresto Collar for Dogs based on your dog’s weight.

Seresto Collar Dosing Table:

Dog Size Dog Weight (lbs) Collar Length inch (cm) Flumethrin (%) Imidacloprid (%)
Small Dogs Up to 18 15.0 (38) 4.5 10.0
Large Dogs Over 18 27.5 (70) 4.5 10.0
Safety

For Dogs:

This collar is for external use on dogs only. Do not use it on other animals. It is not indicated for use on puppies under 7 weeks of age. Before using it on aged, debilitated, pregnant, breeding, or nursing dogs, consult a veterinarian. To prevent drug interactions, talk to a vet before using it together with your dog's other treatments.

For your dog’s comfort, make sure the collar fits snugly but not too tightly. Avoid bathing your dog more than once a month to maintain its eight-month efficacy. The control duration is reduced to five months for flea control and 7 months for tick control for dogs that swim once per month or more.

For Humans:

Do not use it on humans. Avoid contact with the collar if you are sensitive to any of the active ingredients. Wash your hands after handling the collar. It contains small parts and can be a choking hazard. Keep it away from children.

General:

Keep it in the protective bag and in the outer packaging. Avoid attaching a leash to the collar, as this may cause breakage. For your peace of mind, check the collar fit regularly.

Are there Any Specific Storage Instructions for Seresto?

Store the Seresto Collar for dogs in its original, unopened container. Keep it in a cool, dry place. It is not recommended to use the container for food storage or other purposes. Avoid contaminating water, food or feed by storage or disposal.

Benefits

What are the Key Benefits of Seresto Collar for Dogs?

  • Long-lasting treatment: Each collar offers uninterrupted protection for 8 months.
  • Comprehensive protection: Kills and repels fleas and four different types of ticks.
  • No bites: Kills fleas and ticks on contact before they can bite.
  • Non-greasy & odorless: Does not leave a messy, oily residue or emit a strong smell of chemicals.
  • Water-resistant: Stays effective even after bathing, swimming or exposure to rain.
Seresto Dog Collar FAQ

How does the Seresto Collar for dogs work?

Seresto tick prevention collar contains imidacloprid and flumethrin. It uses a patented polymer matrix that spreads from the site of direct contact over your dog's skin surface. This sustained release technology allows slow release of the formula from within the collar, spreading from head to toe, including the tail. The new supply of active ingredients is continuously replenished in low concentrations for 8 months. Imidacloprid protects from fleas, while flumethrin targets ticks.

How effective is the Seresto Collar for dogs?

According to the product label, this best flea collar for dogs kills existing fleas on dogs 24 hours after the first application. After 24 hours, it kills new fleas on the dog within two hours and protects against further flea infestations for 8 months. Seresto flea & tick collar starts preventing new tick infestations at 48 hours post-application. After 48 hours, it repels and/or kills any new ticks on the dog within 6 hours.

Do I need to remove the Seresto collar before bathing my dog?

This water-resistant dog flea collar stays effective even after swimming, exposure to rain or a shampoo treatment. Do not bathe your dog more than once per month and use a gentle, soap-free shampoo to maintain its 8-month efficacy.

How do I remove the Seresto collar from my dog?

To remove the Seresto Collar from the dog, squeeze the outer sides of the buckle while pulling from the other end or side of the collar. You may also cut the collar before applying a new one.

Is the Seresto collar safe for dogs?

Yes. This 8-month flea and tick protection is safe for use on puppies from seven weeks of age. Consult a vet before using it on aged, debilitated, pregnant, breeding, or nursing dogs. To prevent drug interactions, talk to a vet before using it concurrently with other veterinary treatments.

Seresto Dog Collar Reviews

4.8
Average Rating 4.8 Based on 279 Reviews
  • 5 star
     221
  • 4 star
     55
  • 3 star
     3
  • 2 star
     0
  • 1 star
     0
79%
Recommend
79% of Reviewers Recommend This Product
Write A Review
4.8/5
Average Rating 4.8
Based on 279 Reviews
Long-Lasting & Effective Aug 13, 2025
Fleas and ticks haven’t been a problem all season.
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Set-and-forget protection Aug 05, 2025
Long-lasting collar that kept my dog flea- and tick-free with zero fuss.
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No mess and effective Jul 28, 2025
Been using Seresto for a while. No fleas or ticks, and I don’t have to deal with oily spot-ons.
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5 Star! Jul 20, 2025
Such a great solution for my fussy pet
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Lasts long Jul 13, 2025
long lasting and highly effective
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Easy fit Jul 05, 2025
I am relieved to use this
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Worked well Jun 28, 2025
Collar that fits perfectly and keeps those annoying pests at bay
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Great product! Jun 24, 2025
A great product at an affordable price. We buy these every year for our animals. Shipping is quick-despite the long trip.
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Fits well Jun 20, 2025
This suits my baby really well.
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Seresto Dog Collar Jun 17, 2025
Great price and fast shipping. Thank you
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Loved it Jun 12, 2025
Amazing collar with hassle free administration
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Awesome Jun 06, 2025
I'm buying this again
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