This sodium fluoride varnish is used to reduce patient hypersensitivity. Its formula uses the highest concentration of fluoride available and it sets rapidly on contact with saliva. Sweetened with xylitol and clinically proven to provide relief from hypersensitivity for up to 6 months. Varnish may also be used as a cavity liner. Does not contain tree nuts, peanuts, sesame, corn, shellfish, egg, soy, dairy products, or gluten.