Silicone sealant on mouthpiece?

[reefrat]

Thanks all
I will try an inner tube made shim in the channel of mouthpiece tube and a tight zip tie to see how that goes. I also found a trident mouthpiece that looks like a comfobite rip-off but has a smaller tube that should fit, only problem is that the silicone rubber is much softer than a real Apeks or Aqualung version and I doubt it will be as secure in the mouth as the originals.

 

[grf88]

A couple of wraps of the silicone repair tape that sticks to itself might work.

 

[rsingler]

Loctite GO2 glue. Still softish, but firmer than silicone. Perfect filler for your issue. Then zip tie after cured.
https://www.walmart.com/ip/Loctite-...ukJLLRhRl3j9-3dCZ5h-ZKQ29IUPxvEcaAlaqEALw_wcB

 

[Couv]

I like @northernone 's innertube idea and think it's worth trying first. If no joy try the solution a friend of mine came up with for a similar issue. Put a tight fitting o-ring with a large cross section over the tube, then install the rubber mouthpiece and secure with a tie wrap.

Edit:
108 with a -117 o-ring

 

[АлександрД]

Once I was try to attach modern mouthpiece to antic doublehose.
It use adaptor with nut (left bottom item on the pic), but inner pipe is too narrow against to mouthpiece.

I just take double sided foam adhesive tape
It takes three or four turns, then I moisten it, put mouthpiece on that, and used two zip-ties.
It works. Works very well

I used such tape

 

[johndiver999]

A few wraps of cheap electrical tape-
Takes longer to talk about than to do.