Aborted glue job.

[MikeyBE]

So, gluing up my first tub... I follow all the steps with numerous layers... I mount the tub this afternoon, but realise I've screwed up and it is off centre, and I've broken the bond trying the centre it. Took the pave tub off the Rim. So plenty of glue on the tub, bits left on the Rim. What do I do now????

Was thinking another layer on the Rim, another layer on the tub and try mounting again later?





Thanks!

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[sungod]

bits of glue are not an issue, but that rim looks like most of the glue came off leaving it bare, which suggests the rim was really not clean enough - on my cf rims the glue stays put

on a new rim there can be traces of release agent from manufacture

to be sure of a good bond i'd remove the remaining glue, then give the rim a clean before gluing again

use white spirit, white gas, petrol etc. to remove the glue - best done outside with no sources of ignition nearby

then use a very fine steel wool, 0000 grade, to go over the surface, the purpose is not to roughen it, just to mechanically remove any tenacious release agent

give another wipe with white spirit, then use a clean paper towel and a solvent (acetone, isopropyl alchohol etc.) to do a final degrease

then glue it!

[MikeyBE]

bits of glue are not an issue, but that rim looks like most of the glue came off leaving it bare, which suggests the rim was really not clean enough - on my cf rims the glue stays put

on a new rim there can be traces of release agent from manufacture

to be sure of a good bond i'd remove the remaining glue, then give the rim a clean before gluing again

use white spirit, white gas, petrol etc. to remove the glue - best done outside with no sources of ignition nearby

then use a very fine steel wool, 0000 grade, to go over the surface, the purpose is not to roughen it, just to mechanically remove any tenacious release agent

give another wipe with white spirit, then use a clean paper towel and a solvent (acetone, isopropyl alchohol etc.) to do a final degrease

then glue it!

Cheers sun God. I did clean the rim, however maybe the glue pulled away as I had had the tub on for around 40mins before ripping it off?

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[yz387]

I am not sure that is a sign of the rim not being clean enough. I had the same result when I had to pull the tire off right after mounting when I realized I had forgotten the valve extender.

In my opinion, I would clean the remaining glue off the rim and start over.

[sungod]

which glue?

with mastik one i've *never* had the glue detach fron the rim like that, usually it pulls off the basetape coating if it was a new veloflex or 'splits' within the glue layers

[MikeyBE]

which glue?

with mastik one i've *never* had the glue detach fron the rim like that, usually it pulls off the basetape coating if it was a new veloflex or 'splits' within the glue layers

Mastik One, Vittoria Pave 25 tubs

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[sawyer]

Another layer on each and get them back on

There is no problem there

tbh you could put two more layers on that rim, but it will adhere fine with one I'm sure

[MikeyBE]

Another layer on each and get them back on

There is no problem there

tbh you could put two more layers on that rim, but it will adhere fine with one I'm sure

This is what I did. Curing now.. Cannot wait to ride these bad boys.

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[yz387]

This happened to me with mastik one as well. I agree that I have never seen it happen when pulling off a tire which was allowed to properly cure, but when pulling off a tire right after mounting, the glue detached from the rim.

[continuum]

Is glue better than tape? I've never used tubular glue myself.

[MikeyBE]

Is glue better than tape? I've never used tubular glue myself.

This is my first set of tubs. From what I've heard, I don't trust tape!

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[sawyer]

Tape correctly applied is entirely trustworthy

My problem with it is the residue it leaves and the tendency to noisy air bubbles

But it holds tyres on very very well

[zappafile123]

So I take it that if you couldnt centre the tire during installation, there was wet glue on either the rim or the tire before you tried to mount the tire? Trying to do that is a messy, bad idea IMO.

Apply all the layers of glue to the rim and maybe a couple to the tire. Let the rim and tire dry completely. Mount the tire, then lift sections of the tire one at a time and apply the final layer of wet glue section by section. Way less messy and the tire will be position perfectly every time.

[MikeyBE]

Thanks for the tip. Will try next time!

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