Lee Rothrock is looking for a spray to repair a leaky bellows.
We have we been restoring leaky bellows for at least 30 years and
have yet to find any suitable product that will spray on and cover
a crack or open leak.  The only option we have is to completely
rebuild the bellows with new materials.

There is one exception and that is if there is only one small hole
or leak in a bellows, it might be possible to apply a small patch.
Normally, however, the best approach is to rebuild the bellows.

Tony Ciuffini