Photopolymerizable cavity fund for use under composites and amalgams. Its used for the filling of small cavities in temporary teeth. Helps protect the tooth against sensitivity as it releases ions of calcium and fluoride. It is presented as a one-component and photopolymerizable product, which, without mixing, saves time and material. Fluoroseal once set is substantially harder and more hydrophobic than glass ionomers, making it more resistant to seepage.