[Cob] Planter

Mon Feb 5 17:54:41 CST 2007

I plastered over a metal drum with my lime-paper mix and figured it 
would all fall off.  but I also gave it one coat of waterglass.. and 
after 2 wet winters nothing has got soggy, etc.!!!

the colors have faded from the sun, but the plaster itself has turned 
back to a limestone, and the waterglass ( thick like egg white) seems 
to have protected it.
  here is link to the photo, I used liquid bluing and drizzled it down 
full strength, but now it is a light blue only..

the colorful glass"necklace" is broken pipe and bong glass tossed out 
that I salvaged.

waterglass can be bought at reasonable cost from 
www.chemistrystore.com.. type in sodium silicate

barbara Roemer gave me a small jarfull, and that is what I used, not 
sure where she got it, or what brand/type.

here is an email from Ed
From: Raduazo at aol.com
Date: February 24, 2005 5:06:01 PM PST
   \

writes:

waterglass on cob benches and where in
Northern California or Oregon  can it be bought???

Yes You can buy it from Post Apple Scientific inc. in PA 16428 and it 
will
waterproof cob however; I have heard that if the waterproof surface gets
damaged  and water gets into the cob it will not allow water to 
evaporate properly.
I  have had good luck with linseed oil. It penetrates deep into the cob 
and
forms a  deep waterproof layer not just a surface cover. My playhouse 
at Green
Spring has  had 60 inches of rain with no roof or water protection what 
so ever
other than  the linseed oil.
Ed

On Feb 5, 2007, at 2:38 PM, Michael Montagne wrote:

I'm wondering if a planter is a good application for my next cob
project.  I have an oven and a bench but the plaster work is not
weathering the Portland, Oregon winter as well as I have liked.
Now I'm pondering a front yard planter.  Perhaps with mosaic tile.  But
how to waterproof?  Or is it just forcing an application that is best
left to a material other than cob.

-- 
Michael Montagne
michael at themontagnes.com
http://www.themontagnes.com

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