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Almost anything is better than hot glue. Contact adhesive, or epoxy (preferably a flexible one) would work. As with any adhesive bond, surface preparation is key. make sure the surfaces are roughed up a bit to give more surface area for the glue to grab on to, and make sure everything properly clean and dust free.
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Almost anything is better than hot glue. Contact adhesive, or epoxy (preferably a flexible one) would work.
I was thinking of buying something recommended by EasyComposites, because they seem to have lots of specialist knowledge. How about this Permabond flexible epoxy? Is it better than the stuff in DIY shops? https://www.easycomposites.co.uk/semi-flexible-15min-epoxy-adhesive Perhaps I could build up a sandwich of glue alternating with bits of tyre?
Car tyre sounds good. Maybe old bike tyres are more convenient and would work though? I don't have any experience of hot glue, would contact adhesive be better? The glue that I've seen cobblers use looks like contact adhesive. They also thoroughly rough up the surfaces before gluing.