Hello mjoekingz28, I don't understand it either it is some kind of chemical thing but that is how it works. just follow the directions, rough up the area around the hole, apply glue (aka vulcanizing fluid) wait until it dries then apply the patch. then you can install the tube almost immediatly
as Metinger says most carry a spare tube to just replace the punctured one, then patch it at home. depending on the length of ride i sometimes carry 2 or more spare tubes, when riding clinchers, and patch them at home or at rest stop.
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk