The company’s earlier product line consisted of pyrethroid insecticides, including Cypermethrin, Deltamethrin, and Lambdacyhalothrin.
Mortein "Insect Seeking Fly Spray" uses the active ingredients Allethrin (2.09 g/kg) and Resmethrin (0.39 g/kg), both Pyrethroid neuro-toxins which are not known to be harmful to humans in typical doses, and break down after one or two days.