This fluoride application is recommended for the treatment of hypersensitive teeth and to seal dentinal tubules for cavity preparation. It dries to a natural white color to ensure patient compliance and is delivered in a convenient “peel and apply” package to eliminate mess and risk of cross contamination. Sweetened with Xylitol, Duraflor Halo is free of gluten, tree nuts, peanuts, sesame, corn, shellfish, penicillin, egg, soy and dairy products.