I just saw your reply to my question. Thank you, so unlike Hans,
you do find that you can polish HXTAL safely? But only if it is in
between two materials? But never as a surface material?
Just to clarify.
Hxtal is quite possible to polish were it to be used as a protector.
It is basically a resin and so has similar polishing characteristics
to polyester resin.
But it is primarily a bonding agent, used in the restoration and
repair industry. As a glue for glass, there is not much to beat it. For
a definitive PDF file on it go to
It is, as Dave said, excellent to stabilize porous stones, firstly
because it has great penetrating properties, is colorless and becomes
very hard and will outlast your grandchildren. It can be used as a
surface protector, but if it is used in a high wear area like a ring
or bangle, it will abrade in a similar manner as perspex does. In a
porous stone, generally the surface area is negligible, so it works
well like that.