Need a bug spray that packs a one-two punch? Enforcer BugMax Flush & Kill will kill fast on contact and its residual action keeps killing up to 3 months. BugMax Flush & Kill is a water based formula and non-staining. ItÕs used for indoor household and domestic use only. Controlling a broad spectrum of insects, will also kill Carbamate and Organophosphate resistant cockroaches.