Got a tear in the fabric of a Schwalbe Marathon GG (obviously a manufacturing defect), caused a sidewall blow out when I was about thirty miles from home. Cleaned and dried the inner surface as best I could, applied “vulcanizing fluid” and one of those long oblong patches from my repair kit. Don’t recall now whether I was also able to patch the tube or had to install a spare, but made it home and the tire lasted that way until the tread wore down enough to expose the colored stripe underneath.