Cork tends to take a set, so I would be concerned that the torque on the
mounting bolts might be lost over time, which might be a problem in some
applications. 
    Alan
wrote:
> 
> My three concerns would be:
> 
> Is it going to swell up?
> 
> Will it break down and crumble if saturated in oil?
> 
> Will it leak?
> 
> I don't know the answers to these questions.
> 
> Ian