Stop spiders in their tracks with CimeXa Insecticide Dust. CimeXa is 100 percent engineered, amorphous silica and lasts up to 10 years when undisturbed. Apply in hard-to-reach and damp areas where spiders like to hide. It’s odorless, non-staining and non-repellent, so it won’t just drive spiders and pests into other rooms. CimeXa is also effective against bed bugs (including pyrethroid-resistant populations), fleas, ticks, lice, cockroaches, ants, firebrats, silverfish and mites. It’s even labeled for treating drywood termites.