Neutral 2% Sodium Fluoride Gel at pH 7.0. · Flavors: Strawberry, Mint in 16 Oz. Jar. The Fluoride Gel is used in prevention of caries. Treatment can be repeated in 6 months. The Gel can be applied with a cotton swab or dispensed into a fluoride tray. The patient is then asked to keep the material against the teeth for a total of 60 seconds.