When I repair long extension cords I put those thick leviton or starelo plugs on each end and usually I cut them at where there is wire showing.
But I hate to cut a hundred foot length into four 25 feet lengths.
The reason is in many cases it's just the casing and not the wires which are cut (usually from bending around sharp objects) such that they "can" be saved perhaps?
Assuming the copper conductors aren't showing, what do you use to repair extension cords that's better than just duct taping them at those breaks in the outside sheathing?
Is there something made for the purpose that can be used like maybe heat shrinking something on that doesn't require the connectors to be removed?