Cob: Waterproof covering

[Charmaine R Taylor]

Hi Natalie if you plaster with a clay-tinted lime recipe you won't need 
to add anything else, lime is supposed to be out in the weather, and has 
been used as a protective and sacrificial  coating for a very long time.

If you don't want a white sculpture then just add enough powdered or 
soft clay to the mix to get the color you want. and then limewash with a 
clay tinted wash too.  that all...

there is a product called soy-seal too by some folks in the midwest, 
 but they have not answered any emails I've sent about their product.

Ms. Charmaine  Taylor/ Taylor Publishing
http://www.dirtcheapbuilder.com    http://www.papercrete.com
PO Box 375, Cutten (Eureka) CA 95534
707-441-1632     tms at northcoast.com