epoxy for minor paint-saving non-strutural mod.??

[tho...@kokopedli.com]

I think this is reasonable, but would love any feedback
I am aiming to cut off the top of an (over)extended seat-tube and attach a full-ring seat-binder to the new, now lower top-end of the seat-tube.
This being a 'non-structural" point of the frame that will be tightened by the bolt whenever there is a rider, I'm imagining that it is safe to epoxy the full circle of new seat-binder onto the top of the seat-tube and save the paint.    Maybe I need to remove the paint from under where the new binder will be, maybe not?
     And is epoxy good or would you recommend something else ?

noMadic  Thomas

[tho...@kokopedli.com]

I realize I did not clearly state:

I am thinking of epoxy instead of brazing
that lack of brazing is how I would save the existing paint-job.
This could have been confusing because I do mention I'm not sure if I would be best to remove paint so the glue would stick, that is a secondary concideration.

I hope my main question is clear, simply if epoxy is a good enough way to attach a binder-bolt collar that does not have any direct connection to the stays or top-tube.

noMadic   Thomas
who does have a torch and enough skills to braze on the collar if epoxy there is a no-no...
I suspect epoxy is good enough, just asking a reality check...      thanks for your time and attention !!
    ( and any response )

[Steven Shand]

I might not be understanding you properly, but if you're going to go to that trouble (cutting the seattube), can't you just use a regular seat collar? Assuming you can get something the correct size. Why do you need to epoxy something on?

Steven

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[tho...@kokopedli.com]

Excellent question Steven and Jim !    This is for a travel bike that will have the seat-post removed and re-installed regularly, so the idea was to make sure the collar does not come loose and dissapear.     Following your question, and David's caution about the repeated flex of a collar being hard on the epoxy-bond, I think perhaps I will get 2 collars and keep one in reserve in case the original goes AWOL, if it does, I will braze-on the second one and do some paint touch-up    =)
Plausibly a good tight(interferance)fit is all I need for a functional collar and to keep it in place...

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[Dan Chambers]

Since the adhesive is just to prevent loss, rather than truly structural, maybe consider something more flexible than epoxy?

I have used 2-part methyl methacrylate adhesives successfully on similar, but non-bike, projects. 
They have good strength, and none of the brittleness of most epoxies. 

All the best, 
Dan Chambers