Bengal Ant & Spider Killer contains 3 pyrethroid insecticides to kill many species of ants, spiders, scorpions, stinkbugs and other listed insects. Stops spiders and their webs. Bengal Ant & Spider Killer provides long-lasting control of German cockroaches for up to 40 weeks on non-porous surfaces. This water-based unscented formula kills by contact. It leaves no oily reside and is non-staining.