Nick from Fl writes
How long does it last outdoors? Does the stronger rate make it last longer?
Tandem will hold like most other insecticides outdoors which is anywhere from 30-90 days depending on the elements in the area and how they effect it. The stronger rate on the label will provide a quicker knockdown for heavier infestations and can help provide a stronger product for longer on the surface.
Answer last updated on: 02/06/2014