Fiprotec CAT is your monthly guard against fleas on any cat weighing less than 8kg. It will kill all existing fleas in your cat’s coat within 24 hours and continue to prevent further infestation for up to 5 more weeks. Fiprotec is also an effective tick control for up to two weeks after application. The treatment remains waterproof for a month. Important: do not apply to kittens younger than three months.