Seresto® for dogs
The innovative flea and tick collar
For long-lasting protection

The Seresto® collar for dogs repels and kills ticks and kills fleas through simple contact, which means they don't have to bite your dog before they fall off and die. No biting means no itching and giving your dog the needed protection. If the parasites aren’t biting and sucking blood, there is a reduced risk of transmitting infections, which means you can put Seresto® on and simply know that your dog is well protected.

Seresto is a collar like no other! It works by releasing its active ingredients in controlled, low doses, allowing your dog to stay protected for up to eight months at a time. Odourless, water-resistant and effective against both fleas and ticks, the Seresto® dog collar is the simple, easy way to keep your best friend protected for longer.

Why Seresto ®?
Effective for up to 8 months
Kills and repels parasites before they bite your dog
How does this product work?
Seresto tower HP Dog
How does this product work?

At first sight, Seresto® might look like just another pet collar, but there’s a lot going on beneath the surface. The collar consists of a polymer matrix that slowly releases two active ingredients – imidacloprid and flumethrin – onto the layers of your dog’s skin and coat. The collar works to build up an invisible layer of protection that kills fleas and repels and kills ticks that come into contact with your dog.

Seresto® Dog Products

Seresto dog packshot
Seresto Dog Step1
Remove the collar from the pouch.
Remove any remaining plastic connectors on the inside of the collar.
Seresto Dog Step2
Put the collar around your dog’s neck and insert the loose end into the 2 loops
– cut off any extra length of collar, leaving about 2 cm of the loose end beyond the second loop.
Seresto Dog Step3
Make sure it's neither too tight nor too loose. Ideally two fingers fit between the collar and your dog’s neck.

What is Seresto?

It’s an innovative collar that protects your dog from ticks and fleas for up to eight months. This means that you don’t have to worry about more frequent applications of flea and tick treatments, and there is no risk of forgetting to do so.

What makes Seresto different from other flea and tick collars?

Seresto’s innovative technology enables it to release controlled doses of the active ingredients over a long period of time. The ingredients are transferred to your pet’s skin and coat, and spread across his entire body, keeping him protected from ticks and fleas for up to eight months.

What are the active ingredients in Seresto?

Seresto contains two active ingredients: imidacloprid, which kills adult fleas, and flea larvae; and flumethrin, which repels and kills all life stages of ticks.

Why am I still seeing a tick on my dog when he’s wearing a Seresto collar?

Ticks may still get onto your dog’s coat when he brushes past them, even if he’s wearing a Seresto collar. The active ingredients work on contact, which means the tick needs to grab onto the fur to get exposed to the active ingredient. However, once they have climbed on, the ticks will fall off and die. You may therefore sometimes see ticks tangled in your dog’s fur.

My pet has started chewing the collar, should I be worried?

As the vast majority of active ingredients are bound in the collar matrix and not on the surface, they are not released or absorbed when the collar gets chewed. If any, mild gastrointestinal signs may be seen. Nevertheless chewing should be avoided and if your dog manages to get his own collar into his mouth it’s likely that it is applied too loosely. Ideally two fingers fit between the collar and your dog’s neck.

Is Seresto safe for puppies?

It’s safe for use on puppies aged seven weeks and older when used as directed

Should I leave a gap between taking off an old collar and putting on a new one?

No. It's even important to put it on without any delay to assure a continuous protection of your dog.

My Seresto collar doesn’t smell at all. Does this mean it’s not working properly?

No, it doesn’t. Seresto is odourless, so there are none of the unpleasant smells you usually associate with flea and tick collars.

Most other flea and tick collars require stretching to activate them. Do I have to do this for Seresto?

No. Stretching the collar for activation is not necessary. Seresto’s efficacy against fleas and ticks is reached within 48 hours after application of the collar to your pet.

Other brands recommend brushing the collar against my pet’s tail and belly before putting it on. Does Seresto?

Seresto doesn’t work this way, so there's no need to brush the collar anywhere on your pet. Simply put the collar around your dog’s neck and make sure you adjust it properly.

What should I do if the collar gets dirty? Will a muddy collar still protect my pet from fleas and ticks?

We are not aware of mud having an impact on the release of the active ingredients in Seresto and hence its efficacy. A normal, small amount of dirt would not be expected to be an issue. There could be an impact if the mud is thick and creates a barrier between the collar and the coat of your dog. The Seresto collar has been extensively tested in real-life households, with outdoor dogs and cats, with no reduction in efficacy. If the collar does get dirty, you can simply wipe it down with a moist cloth.

Can I attach a leash or a nametag to my Seresto collar?

No, you shouldn’t attach a leash to the collar, as the force of your pet pulling against it would potentially open the safety mechanism. Use your normal collar in addition to Seresto to attach the leash. Seresto has been fully tested with safety reflectors specially developed for Bayer collars, but no other items have been tested, so they’re not recommended – especially if they cover the surface of the collar.

Is Seresto dog collar water-resistant? Do I need to remove the collar if my dog gets wet??

Seresto does not need to be removed when a dog goes swimming or is bathed. The active ingredients are contained in the collar matrix and will not be released into water. They spread through the lipid layer of the dog's skin and hair and even if this lipid layer is partially washed off by bathing, Seresto will quickly replenish the active ingredients and the pet will be protected again.

However, prolonged, intense exposure to water or extensive shampooing should be avoided as the duration of activity may be reduced. Studies showed that monthly shampooing or water immersion did not significantly shorten the 8 months efficacy duration for ticks after redistribution of the active substances in the coat whereas the product’s flea efficacy gradually decreased, starting in the 5th month.

How often can I let my dog swim when using a Seresto collar?

Seresto is water-resistant. It remains effective following swimming, the use of a mild shampoo with non-detergent ingredients, or exposure to rain or sunlight. There is no need to remove the collar for swimming. Under normal conditions, i.e. less than one bath per month, it’s effective for up to eight months; for dogs that swim or bathe frequently, the control duration for fleas is reduced to five months.

What happens if my dog gets his Seresto collar stuck on something?

Seresto is designed with a safety-release mechanism. In the unlikely event of your pet being trapped, the collar will widen when he gives a hard pull, allowing for a quick release. The small dog collar has a two step safety mechanism as it is additionally equipped with a predetermined breaking point, so a harder pull will break it.

Can the Seresto collar be used alongside normal collars?

Absolutely. Seresto can be worn alongside your dog´s usual collar without compromising its efficacy, as long as contact with hair and skin is evident.

My dog is scratching at the collar, causing redness and irritation. What should I do?

There is a slim chance that your dog might develop mild reactions such as scratching, redness and hair loss. These symptoms usually disappear within one to two weeks, without removing the collar, as your dog gets used to wearing it. In some cases, temporary collar removal may be recommended until the symptoms have disappeared. In very rare cases in dogs, application site reactions such as dermatitis, inflammation, eczema or lesions may occur and in these instances, collar removal is recommended. Please consult your vet if the symptoms persist or become more severe.

How often should I check the tightness of the Seresto collar on a growing puppy?

Puppies grow at different rates and we recommend frequent checks of the collar and readjustment if necessary. Watch the video above to see how to fit your Seresto collar properly, and always follow the guidelines that are provided.

Can I remove the collar for a couple of months and reapply it again later? Will it still work?

We strongly discourage you from doing this. This method of application hasn’t been tested and it might have an impact on the level of protection your pet receives. For the best flea and tick protection, Seresto should be used all year round. However, if you’ve removed the collar only temporarily (e.g. during grooming), you can reapply it without any problems.

How should I dispose of a Seresto collar?

Used collars or any remnants should be disposed of in accordance with local requirements. The product should not enter water courses.
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