Originally Posted by
garage sale GT
It's track glue. It's hard like that. It cuts rolling resistance but is too brittle and long-drying for street use.
I would be a bit concerned about those plies peeling away, assuming that's not just rubber in pic #3.
Pic #3: can't you just tighten that section up with a little sewing? they are sew ups, right? or to patch them are you supposed to get in the tire at the seam and then repair the seam after you patch the tube?