5% sodium-fluoride varnish with xylitol delivers the optimal fluoride dosage that dries to a natural tooth shade on contact. Simple, fast, mess-free application and easy cleanup. Smooth, nonclumping formula. Sets rapidly in the presence of saliva: no need to isolate teeth. Gluten-, aspartame-, and saccharin-free. Also free of tree nuts, peanuts, gluten, soy, and other common allergens.