If the storage area is empty, you have good ventilation, and you can allow about 30 days for a cure, I'd recommend sealing with a two-system epoxy. One such brand (there are many) is Devcon's Concrete Floor Sealer. Best, Mike Trinkley -- Michael Trinkley, Ph.D. Director Chicora Foundation, Inc. PO Box 8664 Columbia, SC 29202-8664 803/787-6910 www.chicora.org [log in to unmask] ========================================================= Important Subscriber Information: The Museum-L FAQ file is located at http://www.finalchapter.com/museum-l-faq/ . You may obtain detailed information about the listserv commands by sending a one line e-mail message to [log in to unmask] . The body of the message should read "help" (without the quotes). If you decide to leave Museum-L, please send a one line e-mail message to [log in to unmask] . The body of the message should read "Signoff Museum-L" (without the quotes).