Definition: In table tennis, speed glue is used to increase the spin and speed that can be achieved. Control is also improved on those shots where spin is used. Some control will be lost on shots that involve no spin.
Speed glue is specially made by table tennis manufacturers, and is applied in one or more layers to the sponge of a rubber sheet, and often one layer is put on the blade (there are many variations of speed gluing techniques). The rubber and blade are then put together, and clamped to help the rubber stick to the blade without curling up at the edges.
See also: glue, glue sheet