Continuous spray. Quiet spray. Contains Fipronil - the same active ingredient used in Frontline Spray (Sergeant's Pronyl OTC flea & tick spray for dogs & cats is not manufactured by or distributed by Merial. Frontline is a registered trademark of Merial). Kills fleas for up to 30 days. Kills ticks for up to 30 days. Waterproof. Sergeant's Pronyl OTC flea & tick spray for dogs & cats controls infestations by killing fleas and ticks for at least 30 days. Stops and prevents infestation of fleas and ticks (brown dog ticks, American dog ticks, lone star ticks, and deer ticks (which may transmit lyme disease)). Kills fleas which may cause flea allergy dermatitis. Kills brown dog ticks (rhipicephalus sanguineus), American dog ticks, (dermacentor variabilis), lone star ticks, (amblyomma americanum), and deer ticks (ixodes scapularis) for up to 30 days. Kills ticks that may transmit lyme disease, Rocky Mountain spotted fever, ehrlichiosis, babesiosis, anaplasmosis, and haemobartonellosis. Convenient Spray Treatment: continuous spray; quiet spray; sprays from all angles; contains no CFCs.