-----Original Message-----
From: [log in to unmask]
Sent: Thu 5/10/2007 4:01 PM
> Would a sealer be required in every case like this, or only some bricks?
I just lost a long entertaining post to the vagaries of webmail, so mercifully all y'all will be spared and I'll get right to the point.
The scientists here can take me to task, but limited time, had to make decisions, this is what I did.
1994 house rehab. 1926 pebbledash stucco (quartz and mica chips) on aeroplane roof dormer. Aggregate really coming out, all over the roof below. Stucco kind of powdery in some places (suspected asbestos fiber content, but I never tested). Dirty environmental pollution grime dulled surface, but it must have been a beautiful shimmery shiny thing in the southern summer sun when new...bright white stucco with glitter.
Needed to consolidate. Limited time. Quick research, chose ProSoCo H40. I see they still produce it. <http://www.prosoco.com/getfile.aspx?filekey={B9137400-233A-4BE2-A0DC-31BE018F6466}',%20'PDS'>
"Sure KleanŽ Weather Seal H40 is a deep-penetrating water repellent and consolidation treatment for brick, most natural stone, terra cotta, historic concrete, stucco and cast stone surfaces. H40 protects against deterioration caused by water and waterborne contaminants while strengthening weathered surfaces and soft mortar joints. H40 reduces the severity of biological staining common to regions with high relative humidity. It helps prevent the rapid recolonization of biological species such as mold, mildew and lichens that normally thrive on masonry and natural stone architecture."
Challenge: how to clean the stucco so as to apply the consolidant. Did what we could gently, really really fragile, not optimal. At all.
Suggested 10 year lifespan before recoating required.
Very very happy. Huge difference in the stability of the surface. Only now, 13 years later, am I seeing the first stages of aggregate beginning to come out again. Time to start thinking about a reapplication. Glad to see it's still available. Thanks for reminding me.
Can't speak to performance on brick, but in Sharpshooter's scenario, a product such at this seems to me an option in stabilizing the eroded surface of the brick against weathering and absorption. Clearly, given the damage, you would be faced with a maintenance cycle, but at least you could stabilize the surface. Also not speaking to the aesthetic issues of what the "polished brick" would look like, much less the character of the mortar joints (tooling would be gone, I can imagine a really stupid flat 2-dimensional brick and mortar joint surface).
Dan
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