Fluorescent mounting medium is an aqueous mounting medium for preserving fluorescence of tissue and cell smears. This unique formula prevents rapid photo bleaching of FITC, Texas Red, AMCA, Cy2, Cy3, Cy5, Alexa fluoro 488, Alexa fluoro 594, Green fluorescent protein (GFP), tetramethyly rhodamine, Redox, Phycoerythrin (RP-E), phyocyanin (PC), and allophycocyanin (APC). The fluorescence is retained during prolonged storage at 4 oC in the dark. This medium does not contain phenylenediamine, which destroys immunofluorescence of Cy dyes, RP-E, PC and APC.