Yes. There is one from Molecular Probes Inc. called slow fade which is working very well for us. We can examine samples which are mounted in this medium repeatedly and for extended periods of time without too much problems. Sincerely, Kamiar Moin, Ph.D. Assistant Professor of Pharmacology Wayne State University School of Meddicine Detroit, MI 48201 Tel: (313)577-0514 FAX: (313)577-6739 E-mail: [log in to unmask]