- Enamelast fluoride varnish is a flavored, xylitol-sweetened, 5% sodium fluoride in a resin carrier that produces a mechanical/chemical occlusion of the dentinal tubules in the treatment of tooth hypersensitivity. Its patented adhesion-promoting formula enhances retention, providing superior fluoride release and uptake. - It is non-gritty, nearly invisible in appearance. Enamelast varnish is nut and gluten free. **For further product information, please contact Chat Support**