Activyl

Activyl starts to work quickly after it is applied. Studies show that Activyl kills 90% of fleas within 12 hours of first application. Thereafter, Activyl kills 99% of newly arriving fleas within 8-12 hours for a full month. Activyl has been tested in dogs to make sure it is not easily rinsed or washed off. It remains effective after shampooing and swimming. It also remains effective after exposure to rain.