Timothy from Houston, Tx writes
The general rule of thumb for insecticide concentrates such as Talstar P is that they are good for about 3-5 years from the date of purchase as long as they have been stored at room temperature. If your Talstar is six years old, it certainly would not hurt anything if you wanted to try to use it, but if you find that it is not working as well as it used to, it may be time for some new product. You may also want to speak with the manufacturer directly to see what they would recommend. You can reach FMC at 800-321-1362.
Answer last updated on: 09/16/2015
