I have some reproductions of Revolutionary War Period tea bricks that I am considering putting into a "Touchable" display. The problem that I foresee is that these are rather friable and over, what I suspect will be a short amount of time, they will deteriorate. Does anyone have an idea of a non-caustic sealant or other coating that I could apply to reduce the rate of deterioration? Would Rhoplex be the best choice or is there some, more durable coating out there. I'd like to stay away from the acetone based adhesives like B-72 and Vinac... Any suggestions would be greatly appreciated Rich Busch Assistant Manager of Education Collections Associate Collections Manager of Health Sciences Denver Museum of Nature & Science 2001 Colorado Blvd., Denver, Colorado 80205 [log in to unmask] (303) 370-6071 ========================================================= 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).