It happens, to pepole that have ridden for a long time.
I don't carry much at all. If I were going on a trip somewhere just tools in the kit,I also carry a tire preasure gage,extra fuses,electical tape. On a trip, a 1st aid kit is a good idea,but I don't bother for around town.
I would just get another one instead of hoping the JB weld will hold up.