LED Pro-Seal a light-cured, fluoride-releasing, filled sealant with a proprietary catalyst. This catalyst allows for the complete polymerization of the Pro-Seal without an oxygen-inhibited layer, and consequently no porosity. L.E.D. Pro-Seal is intended to seal the enamel surface around the base of the brackets. In essence, it is placing a clear plastic protective layer on the enamel surface that will not break down in the presence of oral fluids, abrasive foods, or carbonated beverages. 6ml bottle. *Compares to Ortho Solo.