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Posted by Joe on January 2, 2007, 3:41 pm
Todd H. wrote:
> In my shelving project in the basement and spending more time down
> there it's become apparent just how much dust comes off the concrete
> walls and floors in the unfinished area of the basement. I think I'd
> like to go with a white or off white I think if paint is viable.
>
> The walls in question are poured, clean, dry have been around for
> about 15 years if that makes any difference. Water and moisture
> hasn't been a problem in this basement. It gets humid in the summer,
> but that's about it, nothing a dehumidifier doesn't handle. The
> walls are dusty, and i wonder about the best way to get rid of the
> dust before painting. Wet old towel dragged across perhaps? Or shop
> vac with wide broom head might get it done?
>
> I see Behr has a few products, but I'm curious about experiences and
> such. I see Behr recommends of course 2 or 3 other products for prep,
> I'm always suspicious there of the real need, or if they're just
> selling more product.
>
> BEHR NO. 990 CONCRETE CLEANER & DEGREASER (not sure I need)
> BEHR NO. 991 CONCRETE ETCHER & RUST REMOVER. (etching seems
> to be suggested by both coating products below)
>
> No. 875 Basement & Masonry Waterproofing Paint
>
http://www.behr.com/behrx/act/view/products_detail?prodGroupId=118&catName=Concrete%2FMasonry+Waterproofers&catId=17
>
> No. 880 Concrete Bonding Primer
>
http://www.behr.com/behrx/act/view/products_detail?prodGroupId=17&catName=Specialty&catId=22
>
> Any experience with these or similar products? What works well and
> is reasonably low odor?
>
> Thanks as always for any shared experience.
>
> Best Regards,
> --
> Todd H.
> http://www.toddh.net/
Seems to me the Behr products are not at all what you need, since you
aren't waterproofing the concrete. The etching product may be a good
prep for another finish, though.
IMO you have these choices:
1) A water based epoxy like the one Sears and others sell. I have this
on my garage floor, and it''s pretty decent, but some Sears batches
come with a sand non-slip that you may like to avoid. The included
cleaner seems to work pretty well, too. Coverage of these per $ isn't
all that great. Can be safely applied in a closed environment, though,
but may need two or more coats..
2) A better (my opinion) system is the conventional solvent based two
part epoxy systems. Of course acid etch is recommended, but it isn't
all that hard to do, just read and follow directions. One gallon of
part A and one of Part B yield two gallons of paint and the coverage is
what the label says. Sherwin Williams has a good product in their
stores, and there are likely others. Best applied in summer with open
windows and flame sources turned off so you don't have solvent poofs at
a burner.
The epoxies are noted for their tenacious adhesion to concrete, so they
may also have some waterproofing ability. My oldest epoxy floor coating
was a solvent-based done in 1975 and the parts of it not worn away by
traffic still look OK.
HTH
Joe
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