Repairing seat tear in center of driver seat- permatex repair kit or...?
I wouldn't bother with the Permatex kit.
There is an upholstery guy who thinks this stuff is great (though I've not tried it):
http://www.plastidip.com/home_solutions/VLP
Actually melts the vinyl to bond it together.
Reinforcement on the back side would be a good idea.