Many moons ago I stitch drilled a hole in our metal soil pipe (don't ever d o that face on!). The upstairs bit had never been used and a bird's nest wa s firmly wedged in it. Having freed it, as a temporary measure, I put some sort of gloopy tape round it. 30 years on it's finally disintegrated. Gaffe r tape just won't do, so is there some kind of 100mm plastic ring I could f it? It only needs to cover the hole and not make a joint for another pipe. The Timesaver conversion coupling looks like the kind of thing but not sure how wide the strap is.
Any advice appreciated