Originally Posted by DoWorkSon
What does the talc powder do?
Talc acts as a barrier between the tube/tire, aids in reduction of friction and reduced vulcanization of the rubber. A tire/tube combo generates a fair amount of friction when driving and this reduces the chances of a tube failure, and permits the removal of a tube without destroying it. Some people say it doesn't do anything but I have had tubes fixed to the tire when a shop didn't use talc on a tire change.