Ultracide Flea Control Pyriproxyfen .1% (Nylar), Pyrethrins .05%, N-Octyl Bicycloheptene dicrboximide .4%, Permethrin .4% Ultracide Flea and Tick Aerosol is for use in and around apartments, cars, homes, hospitals, hotels, kennels, motels, offices, schools, supermarkets, buses, ships, boats, trains, trucks, warehouses, vets, and other commercial and industrial buildings. Ultracide kills and controls active flea infestations and will provide complete flea control for up to 7 months. Ultracide will also prevent flea reinfestations for up to 7 months.