Odourless and non staining Uses safe Permethrin Low toxicity to humans and animals Lasts up to 4 months Coopex Residual Insecticide is a well known, safe household pest control option. It can be used indoors and externally to control insects in domestic, commercial, industrial, agricultural and public buildings, including homes, hotels, food processing areas and hospitals. It controls a wide range of pests for up to four months.