Seresto flea collars
The active substances, imidacloprid and flumethrin, work synergistically. Small amounts are gradually released through the microlayer on the surface of the collar. The active ingredients of Seresto spread from this microlayer to the sebum layer of the skin and coat. Neutral oils help to spread over the entire sebum layer. The active ingredients move to the sebum layer when needed. This process is regulated by the difference in concentration between the collar matrix and the surface of the collar, resulting in very accurate dosing. As a result, an optimally low protection dose remains present for 8 months.