Tubeless Conversion Failure - Gorilla Waterproof Tape

[bigbikerrick]

I sealed the wheels of my 73 eldo with 3M 5200 over 10 years ago. Never had a leak.
Rick.

[n3303j]

I'm in the process of ripping the 3M 5200FC off the aluminum rim on my 850T3.



I ripped 40 humps off and each and internally every one looked like the above image. That fast cure product looks like it's almost boiling as it cures.

I did mount a tire on the rim and it maintained pressure overnight but the extreme bubble pattern in the test specimens did not inspire any confidence.  So off it goes. Trust me, removal is no fun.

It's riding season. Time to put the bike back together with a tube for the season and ride it. I'll try this project again next January when I have all the time in the world to fuss over it. One group member mentioned building up the product in 3 layers. I think that might be the key for the release of gas during curing. I'm also going to switch from fast  cure to standard cure. I have a feeling it probably outgasses less. I'll do a test first!

[Off @ 90]

That is quite disheartening too be removing the sealant . I have just finished sealing my V7 Stornello spoked wheels using Sikaflex 291 marine sealant .Seems to do the job no pressure drop over a week so that's encouraging . It is slow cure and probably a bit more viscous than  3M sealant.You could do the whole wheel in one go I think .
Did mine over two days half and half . Also installed 90 degree  valve stem 8 mm so no drilling rim .
It's mid winter  here so might be a few months before the wheels get a decent test hoping fingers crossed no leaks .
Duncan