Safer Brand Insect Killing Soap Concentrate will make 6 gallons of OMRI Listed insecticidal soap to eliminate soft-bodied insects. One bottle makes the equivalent of 24 Ready to Use bottles! Safer Brand insect killing soap utilizes the power of potassium salts of fatty acids (insecticidal soap). The potassium salts weaken the insect's waxy protective outer shell. Apply every 7-10 days when insects are present or as needed to prevent further damage. Safer Brand Insect Killing Soap breaks down into its natural elements within 7-10 days, and will not persist in the environment.