Black Flag Foaming Wasp & Hornet Killer aerosol spray delivers a blanketing foam to kill wasps, hornets and yellow jackets by contact. Also use it to control carpenter ants, harvester ants mud daubers, scorpions, spiders (including black widow and brown recluse) and tent caterpillars. The foaming jet spray shoots a powerful stream up 20-feet for fast knockdown, so you can treat nests above ground from a distance. This formula leaves no oily residue and is non-staining to most home siding, depending on age and cleanliness. Before using in an area where spray may contact home siding, test in an inconspicuous area and recheck in a few hours.