Wasp and Hornet Killer3 eliminates wasp and hornet nests by killing insects on contact. Use this product to spray nests with up to a 27 foot jet spray. Use it outdoors where insects live and breed - never use indoors. This product 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.