Answer Boric Acid insecticidal dust is a long lasting effective solution for taking care of roaches, palmetto bugs, ants, silverfish and fleas. Since the active ingredient composes 99 percent of the insecticidal dust, you get more for your money from this product that can be used indoors or outdoors. Dust is non-stainingDust in non-flammableActive ingredient is boric acidPerfect way to eliminate bed bugs, ants, fleas and other insectsSimple and effective solution to a pest problemDurable and long lasting