2% neutral sodium fluoride thixotropic gel. Provides perfect non-acidic balance - flows easily during placement then thickens during treatment to minimize gagging. Safe for patients with porcelain or resin cosmetic restorations - will not dull or etch. Treatment effective in 4 minutes. 16 ounce/480ml soft dispensing bottle with side window for easy dispensing and view of contents, provides approximately 120 applications. Available in pleasant mint flavor - no bitter aftertaste