Hot Shot Wasp & Hornet Killer aerosol kills on contact and eliminates the nest. With a jet spray of up to 27 feet, this product also kills yellow jackets, tent caterpillars and scorpions. It is for outdoor use only. Hot Shot Wasp & Hornet Killer is non-staining to most home siding depending on age and cleanliness (before using in areas where the spray may contact home siding, test in an inconspicuous area and recheck in a few hours). For wasps, hornets and yellow jackets, apply at sunset when insects are least active.