Using this spray jet-foaming technology envelops biting and stinging insects in an entrapping foam that drops them instantly. Coats nests for complete kill. Residual action kills insects returning to the nest. Water-based formula. Contains no chlorofluorocarbons. May be used indoors in places like attics, where nests are commonly built. Shoots 20 feet. Active ingredients: Sumithrin plus Tetramethrin.