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Re: sealing concrete

To: Matt <mbarre@juno.com>, Shop-Talk List <shop-talk@autox.team.net>
Subject: Re: sealing concrete
From: Doug Braun <doug@dougbraun.com>
Date: Sat, 16 Dec 2006 18:25:14 -0800 (PST)
14 months ago I painted the garage floor of our house
with epoxy (a Rust-Oleum "Professional" solvent-based
type).  The floor was maybe 30 years old, but cleaner
than average (I doubt anyone ever changed their oil in
it).  I power-washed it like crazy with strong cleaner
and etched it with a phosphoric-acid-based product.

Then, a few months ago I started getting a bunch of
blisters on in one area.  Under the blisters is a
white, powdery dust.  The strange thing is, that
particular area does not seem different than
any other part of the floor, and I noticed nothing
unusual about it when I did the job.  (The usual
oily spots under the cars' engines are doing fine.)

I guess I can touch up those spots, but it was
disappointing to see the blisters pop up after
admiring and taking advantage of my nice paint
job for 9 months...

I sort of like what places like Home Depot and
Lowe's put on their concrete floors.  Considering
the constant traffic, it holds up really well.

Doug Braun




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