Nothing Safer, Nothing More Effective De Flea products are guaranteed to kill fleas, ticks, mites and lice safely and effectively! These gentle yet powerful products work on all stages of the insects' life cycle without using harsh chemicals or pesticides. Contains dioctyl sodium sulfosuccinate undecyclenic acid to soften the waxy skeleton of fleas, ticks, lice, mites and other insects until the internal organs are saturated and the insect quickly dies. Will not lose effectiveness over time. All De Flea products can be safely used with other flea control products. Flea & Tick Shampoo effectively kills fleas and ticks while relieving skin irritations and fleabite dermatitis. Safe for use on dogs, cats, puppies and kittens over six weeks old. Economical 8 oz concentrate dilutes 3:1