Coopex Residual Insecticide is a wettable powder that creates a residual surface spray for the control of general insect pests in and around the home. Just add the powder to water at the rates given on product label and apply with a knapsack sprayer, bucket pump or other sprayer capable of giving a coarse spray directly onto exposed surfaces frequented by the pests. Coopex Residual Insecticide offers sustained residual activity providing up to 4 months protection.