Martin's Viper Insecticide ConcentrateViper Insecticide Concentrate offers residual control of roaches, ants, silverfish, spiders and many other insects. Contains Cypermethrin 25. 4%. Available in 1 ounce, 4 ounce, and 1 pint. Other Takeaways For use around warehouses, industrial buildings, greenhouses, rail cars, hotels and other listed sites May be used indoors. (Excluding California) Product Type: Consumer Use Sites: indoors, outdoors, lawns, ornamentals, lumber, logs Effective