How does Seresto work

Seresto is not just any ordinary collar! 

Hidden inside Seresto is a unique polymer matrix which stores its active ingredients and releases controlled doses to your pet’s skin and coat, so they spread across their entire body. As these naturally start to wear off your pet's coat, through hair and skin cells shedding, Seresto will top them back up.
The active ingredients are clinically proven to kill fleas and actively repel and kill ticks through contact, so no bite is required1, protecting dogs and cats from fleas and ticks for 7-8 months without the need for repeated application. 

The videos here show how Seresto works for both dogs and cats.

Want to know more about Seresto?

Seresto Sustainable Pack

What is Seresto?

Want to know more about Seresto Flea and Tick Control collars?

Buy Seresto Flea and Tick Control collar

  1. Mehlhorn et al. Parasitol Res (2001) 87:198-207, information is regarding mode of action and is not intended to relate to speed of kill or to imply parasites can be completely stopped from biting. An attachment of single ticks after treatment cannot be excluded; for this reason, a transmission of infectious diseases cannot be completely excluded if conditions are unfavourable.

PM-UK-25-XXXX

Date of review: March 2025

© 2025 Elanco or its affiliates