Do not apply to food or dishes. Do not use this dust in damp or wet areas, or effectiveness will be reduced. Repeat applications as needed. Both boric acid and silica aerogel dusts are slow acting. Either one may be combined with other pesticide formulations to provide immediate and residual control.
Check labels carefully for active ingredients.
It may be difficult to find silica aerogel alone or in a mixture with other insecticides. Dusts are preferred because they will disperse deeply into cracks, walls, voids and other inaccessible areas that are not treatable with other formulations. Dusts and baits are most adversely affected by damp conditions. It is used most often as spray applications. It has little residual effect, so is effective only in flushing insects out of hiding or as a contact spray.