Viper is a liquid formulation of Cyper WP Viper is a synthetic pyrethroid having a low toxicity to humans and animals.Viper is a liquid formulation of Cyper WP Viper is a synthetic pyrethroid having a low toxicity to humans and animals. Synthetic pyrethroids are man-made insecticides created to mimic the chemical properties of the naturally-occurring insecticide pyrethrum, which comes from Chrysanthemum flowers. Synthetic pyrethroids, like cypermethrin, have a longer residual than the natural pyrethrum. Viper is a pyrethroid insecticide that affects the nervous system of insects. Products that contain cypermethrin have directions to apply indoors and outdoors. Cypermethrin is commonly used as a crack and crevice or spot treatment for residual control of spiders, ants, carpenter ants, centipedes, millipedes,scorpions, American cockroaches, ladybugs, carpenter bees, spiders, scorpions ,yellow jackets and other insect pests.
