Go to Bunnings, if you can, and buy a roll of silicon tape, aka Tommy Tape, Rescue Tape, etc. One wrap around the tube at each ring location should do the job. Make sure you stretch the silicon tape tight, as it adheres best in a stretched state, and over lap at the ends to lock it. This stuff is used to seal boost hoses on turbos, and pipe leaks, so it is plenty strong enough for your use.
https://www.bunnings.com.au/tommy-ta...E&gclsrc=aw.ds