Varnish with sodium and calcium fluoride with remineralizing and desensitizing action. Advantages Quick Drying: Quicker application, Colorless: Does not compromise esthetics. Easy to apply: Speeds up the procedure.Clean and properly dry the surfaces to be treated. Shake well Duoflorid XII prior to using it. The product shall be perfectly homogenized at the time of application. Put drips of Duofluorid XII over a Cavibrush (FGM) micro applicator, and apply on the surface to be treated. The proper consistency is that where the varnish can easily flow through the dropper.