Oa2ki is a perffectly safe Diatomaceous Earth Organic Insect Killer Aerosol Powder Spray. As made from fossilised earth its so safe pets and children need not be excluded from the treated areas. Its a residual spray meaning it will continue to work as a non-checmical treatment for as long as its left untouched. The way it works is by breaking down teh insects outer layer so its dehydrates and dies. As a non checmial method results will take longer to be effective.