Raid Max Perimeter Protection keeps German cockroaches out. This insecticide keeps killing German cockroaches for up to 18 months on non-porous surfaces and can be used both indoors and outdoors. Kills a wide variety of insects such as Ants, Fleas, Flies, Gnats, Roaches, Ticks, Silverfish, Crickets, Spiders, Mosquitoes, Centipedes, Firebrats, Small Flying Moths, Stink Bugs, Sowbugs, Ground Beetles, and Boxelder Bugs. Refill. Physical Form: Liquid; Application: Beds; Fabrics; Pest Type: Ants; Crickets; Firebrats; Fleas; Flies; Flying Moths; Gnats; Mosquitoes; Roaches; Scorpions; Silverfish; Volume Capacity: 128 oz.