Like other here I like to keep old shoes going for the garden/workshop, long after they should be sealed in a concrete sarcophagus for the good of humanity.
I've heard other positive reports on shoo goo.
I've had very patchy success using contact adhesives on things like trainers where the soles peel off or split into layers. I think the big problem is how quickly the splits get full of dust and grime.
I have a pair of manky crocs I keep just in the (covered) space between the back door, my workshop and the garden door.
Very nearly worm through replacement is unlikely right now and a split became huge. I fixed it with Gorilla clear, which stays flexible, using lots of sellotape to keep things in place a for a few hours. To my surprise it's worked really well.
neil