Sep 03, 2014 - 08:30 AM
Once you mix it, use it within a couple of days. The container unopened or sealed should last about 2 years. After it is opened and exposed to air, it will last about 1 year.
Sep 06, 2014 - 09:27 AM
Its the water itself that breaks the chemical down if left in the spray tank. Once applied, and the water dries leaving a film of chemical, that chemical will last up to 6 weeks.
Typically, fly control requires constant applications of whatever you use to get results. Even though this product is very good, it still requires repeat applications for best results.