Raid Max® Bug Barrier keeps German cockroaches out. It keeps killing German cockroaches for up to 12 months on non-porous surfaces and can be used both indoors and outdoors. Refill. Physical Form: Liquid; Application: Beds; Fabrics; Pest Type: Ants; Crickets; Firebrats; Fleas; Flies; Flying Moths; Gnats; Mosquitoes; Roaches; Scorpions; Silverfish; Capacity (Volume): 128 oz.