Seresto® for cats

Seresto® for cats

Treats: Fleas, ticks


Pet type: Cats and kittens from 10 weeks


Application type: Collar


Dosage: 8 months

Additional Info & Benefit:
Seresto® Products
Safety Data Sheet
The longest-lasting flea and tick protection for cats

The Seresto collar for cats repels and kills ticks and kills fleas through simple contact, which means they don't have to bite your cat before they fall off and die. Because ticks and fleas don’t need to bite and suck blood to be killed, there is a reduced risk of blood loss, pain, irritation and transmission of infections. Seresto for cats keeps your pet protected for eight months at a time.

Why Seresto® for cats?
Effective for 8 months
Kills and repels ticks
*See product label for further information
Seresto is a collar like no other

The Seresto cat collar works by releasing its active ingredients in controlled, low doses, allowing your cat to stay protected for 8 months from fleas and ticks. Seresto is the easy and long-lasting way to help your cat stay happy and healthy.

How does Seresto work?

At first sight, Seresto might look like just another pet collar, but it’s far from ordinary. Seresto contains two active ingredients, imidacloprid and flumethrin, that are released in low doses and spread throughout your cat’s skin and fur from head to tail. The collar creates an invisible layer of protection that kills fleas and ticks that come in contact with your cat.

How to apply Seresto for cats
seresto collar

Remove the Seresto collar from the pouch. Remove any remaining plastic connectors on the inside of the collar. Put the collar around your cat’s neck and insert the loose end into the two loops. Cut off any extra collar length, leaving about 2 cm of the loose end beyond the second loop.

Make sure the collar is neither too tight nor too loose. Ideally, two fingers should fit between the collar and your cat’s neck.

Seresto FAQs
What is Seresto for cats?

Seresto is an innovative collar that protects your cat from fleas and ticks for eight months, killing fleas and ticks on contact without the need for them to bite and take a blood meal. This means your cat is getting the longest-lasting and best possible protection against fleas and ticks.

What makes Seresto different from other flea collars?

Innovative technology enables the collar to release controlled, safe doses of its active ingredients over long periods of time. These are transferred to your cat’s skin and fur, and spread across your cat’s entire body to keep your cat protected from fleas and ticks for eight months. 

What are the active ingredients in Seresto?

There are two: imidacloprid, which kills adult fleas on your cat and flea larvae in their environment, and flumethrin, which repels and kills ticks. Both ingredients act on contact without the need for fleas or ticks to bite to be killed.

How long does Seresto for cats take to work?

Seresto kills existing fleas on cats within 24 hours of application. Once Seresto has been on your cat for 24 hours, re-infesting fleas are killed within two hours. Once Seresto has been on your cat for 48 hours, re-infesting ticks will be rapidly repelled and/or killed. In the case of paralysis ticks, most are repelled and drop off the cat without biting, within 6 hours of coming into contact with a cat wearing Seresto. These ticks will go on to die.

My pet has started chewing the collar. Should I be worried?

As the vast majority of active ingredients are bound within the collar matrix and are not on the surface, they are not released or absorbed when the collar gets chewed. Nevertheless, you should prevent your cat from chewing the collar. Check to make sure the collar is not too loose. If the collar is chewed, your cat may experience mild gastrointestinal upset. If this occurs, please call 1800 678 368 to speak to a vet or vet nurse on our customer care line.

When can I put the Seresto collar on my kitten?

Seresto collars can be used on kittens from 10 weeks of age. If younger kittens need flea control, they can be treated with Advantage for Cats and Kittens from birth.

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

Replacing your cat’s Seresto collar immediately after removing the expired collar will ensure continuous protection against fleas and ticks.

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

Not at all. Seresto is odourless, which means you don’t have to put up with any of the unpleasant smells you usually associate with older collars.

Can the Seresto collar be used alongside normal collars?

Absolutely. Always place the Seresto collar next to your cat’s normal collar, so that it is in direct contact with the skin or hair.

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

Although uncommon, there is a chance that your cat might develop mild reactions such as scratching, redness and hair loss under the collar. These symptoms usually occur within the first one to two weeks of collar application and resolve soon after, without removing the collar, as your cat gets used to wearing it. In some cases, temporary collar removal may be recommended until the symptoms have disappeared. In the unlikely event that your cat develops any of these symptoms, please call 1800 678 368 to speak to a vet or vet nurse on our customer care line.

What happens if my cat gets her collar stuck on something?

Seresto is designed with a double safety-release mechanism. In the unlikely event of your cat being trapped, the collar will widen or open, allowing for a quick release. The collar is also equipped with a predetermined breaking point for additional safety.

How often should I check the fit of the Seresto collar on a growing kitten?

Kittens grow at different rates, and we recommend checking the collar daily or every second day and readjusting if necessary. 

How should I dispose of a Seresto cat collar?

Used collars or any remnants should be disposed of according to the label.

Pet Type
Approval Code
PD - 01730
Master Brand
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