Normal viscosity is the thinnest glue, high viscosity is the thickest glue, the medium is in the middle. A thicker viscosity will not make fixing the rubber to the blade any easier. Medium and high viscosity glues were created for top players who claim that the thicker glue layer improves the playing properties of the racket. But it is just an opinion for which we have no proof. Some players like thicker glue, some thinner. It is just a matter of preference. The only table tennis glue in the world that is freeze-thaw resistant. NORMAL VISCOSITY.