"Martin Brown" wrote in message
...
In message , Brian Watson
writes

"Sam" wrote in message
...


The crack seems quite secure, and unlikely to spread, but is
there
anything
I can use to secure it before I begin to plant it up? Mrs
Doodar likes
the
idea of the bottle garden in the porch, but is concerned at the
safety
aspect.
Thnx.

I saved a nice old earthenware pot with a hairline crack by
dripping thin
superglue down the crack to hold it together. You have to use the
thin
stuff
though, which is available from model shops.

There is a type of superglue designed for use with glass that is
cured by
exposing it to sunlight.

Ordinary superglue isn't such a good choice if the intended use is
as a
bottle garden. Classic cyanoacrylate adhesives are intended to be
slightly water soluble by design. Not something you want in a wet
environment.

I don't know if the UV cure version is water proof or not. It might
well
be OK.

Or try clear epoxy, DPX slide mountant or old fashioned Canada
balsam.
If it isn't load bearing all you want is something to seal the crack
and
stop it propagating further.

That second requirement is the hard part. I am not convinced that any
glue is going to prevent the crack from propagating when the bottle is
jarred.

Franz