I found a gloss epoxy made for concrete, from U.S. Epoxy: http://www.owlnet.com/epoxy/5.html I like the fact that it's steam-, heavy traffic- and graffitti-resistant too. Remember that optics have heirloom potential, so don't skimp on the rebar! Aart M. Olsen mailto:aart@uiuc.edu 217-244-4688 Library Systems Office Univ of Illinois at Urbana-Champaign