Patching vinyl seat covers?
I fixed a few tears in vinyl seats with superglue.
I put superglue on a tiny section, once it was set, in 30 seconds, on to another tiny section.
I held the two sides together, using one or more of these: with a small needle nose pliers, a tiny flat head screwdriver, sewing needles, just barely poked the vinyl near the edge with the needles.
I did a longer section, with the cover off, same process, just held each section together with my hands.
Has held up to this day, that was years ago.