The proprietary technology within AP forms a protective layer between the active ingredient particles and the applied area adhering them to the surface. As the polyzone crystals erode over time, the active ingredient, deltamethrin, is slowly released, leading to effective control for up to 90 days. This residual gives users the ability to apply the product in many areas, as well as hard-to- spray areas.
—From Bayer HealthCare LLC news release