Kills in seconds. Kills black widow, brown recluse & wolf spiders. Use indoors and outdoors. Non-staining. Water based. Guaranteed to work, or your money back (For terms of guarantee, see back) (Guarantee: If you are not satisfied with this product for any reason, send your written request for a refund to the address below, together with the dated store receipt showing the price you paid. Please allow 6-8 weeks for processing). Questions or comments? Call 1-800-917-5431 or visit our website at www.hotshot.com. Contains no CFCs or other ozone depleting substances. Federal regulations prohibit CFC propellants in aerosols.