PF Harris 128 oz. Ready-to-Use Scorpion Killer. It is non-staining and odorless, making it safe for indoor and outdoor use. For outdoors, apply this product to foundations, eaves, window sills, thresholds, and siding. For indoors, use in attics, closets, window frames, doorways, and anywhere these pests congregate. The product begins working once dry and kills a wide variety of insects including roaches, water bugs, silverfish, ants, carpenter ants, centipedes, crickets, spiders, stink bugs, bed bugs, lice, Asian lady beetles, box elder bugs, fleas, and ticks. Label instructions include directions for proper use and disposal. It contains .03% Deltamethrin.