The GEWO HydroTec is based on 100% of liquefied caoutchouc. It´s a solvent-free water-based table tennis glue (HydroTec) and is completely free of organic solvents (VOC-free). The simple and easy application (to improve the playing effects of large-pored sponge) convinced through a short drying time. It is easy to remove your table tennis rubber from the bat without damaging the sponge. It is also no problem to remove the last traces of old glue from the bat or back side of the rubber.