Kills on contact! Eliminates the nest. Up to 27 ft Jet Spray. Non staining (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). Guaranteed to work or your money back (Guarantee: If you are not satisfied with this product for any reason, send your written request for a refund to the address, together with the dated store receipt showing the price you paid. Please allow 6-8 weeks for processing). Water based. Questions or Comments? Call 1-800-917-5431 or visit our website at www.hotshot.com. No CFCs: Contains no CFCs which deplete the ozone layer.