Rethink Your Life!
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Kiko Denzer on Art


Cob: Bentonite

Brad Calvert bradcalv at netspace.net.au
Thu Jul 3 06:39:24 CDT 2003 

Does anyone know much about Bentonite?  A kind of clay available
commercially for waterproofing irrigation channels and farm dams.  Might be
handy for the final render on a cob wall.  Apparently it expands greatly and
fills cracks when it becomes wet.