two. Idea[s] that is; I'll leave it to to decide if it's a
they are good.
1) Butyl rubber is surprisingly resistant to UV, ozone, and heat, so ages well if oxidising agent -- alcohol, petrol, some oils etc. -- are absent .
Think sections of circa 2" suitable inner tube.
2) Self-amalgamating silicone tape.
(Other brands and suppliers are available
This stuff is tough! 16 years ago I used it (as a temporary measure) to repair a leaking gutter/downpipe joint. I check it every year when I clean my gutters, and despite direct sunlight in summer and sub-zero temperatures in winter, it is still waterproof, and still flexible.
And, it exerts pressure. Wrap a piece around on itself around your finger, with just enough tension to make it adhere, and your fingertip will turn blue in a minute or so.