(Sergeant's) FiproGuard Max for Dogs contains Fipronil and Cyphenothrin. Provides premium protection against fleas, ticks, and chewing lice. FiproGuard Max kills newly emerged adult fleas before they lay eggs. It kills deer ticks that transmit Lyme disease as well as brown dog ticks, American dog ticks and lone star ticks. It also controls mites that may cause sarcoptic mange. Starts killing fleas and ticks in as little as one hour. Fast-acting and long-lasting, sustained-release formula protects dogs for up to 30 days. FiproGuard Max for Dogs is for dogs and puppies over 12 weeks of age. Waterproof.