Strong & flexible DIY vinyl repair?

I got a couple tears in my driver's side of the bench. One area had been professionally repaired before (you can kind of see the rumple around the texture on the lower area), but it looks like I have another tear starting nearby.



I took a look at the usual Permatex-type kit for $15 at the parts store but that stuff looks kind of flimsy. Is there something out there that will both hold well in a high-stress area like the middle of a driver's seat and allow me to press the texture in? I'm most concerned about the repair holding well, I don't want to end up with a massive end-to-end rip. All I can find are little patches for newer-style smooth vinyl seats or inflatables.

Is SEM Chemscreen good for this kind of thing? It looks very strong but I don't know how easy it would be to work with the deep texture on this vinyl.

http://www.tapplastics.com/shop/product.php?pid=288 this will look like you blew your nose on the seat but it will hold