Icon-Etch Refill Kit consists of etching gel, which forms part of the infiltration treatment with Icon. The infiltration treatment can stop the progression of smooth surface white spot lesions up to the first third of dentin. The etching gel opens the pore structure of the tooth to allow the infiltrant to treat the lesion. Contains:3 (0.45 ml) Icon-Etch syringes and 15 Icon-Etch tips