Talstar P Professional Insecticide is perhaps the most broad-spectrum insecticide on the market today. It's labeled for use indoors and out. It can be used in residential, commercial, industrial, and food-handling areas. Talstar P also is known as Talstar One or Talstar Professional. Talstar Professional is water-based, so it’s non-irritating and contains no odorous or plant-damaging solvents. Talstar Professional leaves no unsightly residues and causes no phytotoxicity. Once dry, it is virtually impossible to tell where Talstar Professional has been sprayed.