Vinyl repair of boat seat?

[nhjenny]

I have a small (1/4") slit or crack on the seat of my 2012 Cobalt. Its small, but all the way through the vinyl. It happens to be the seat where everyone steps to get in and out of the boat from our dock (which may be why its there). I would like to repair it before it gets worse. How the repair looks is important to me. Anyone had luck with a repair kit or having vinyl repaired by someone?