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concrete block walls

Posted by Jimmy Tuck on September 3rd, 1997 02:47 PM
In reply to Sealing cinderblock walls by Bruce Miller on September 1st, 1997 09:30 PM [Go to top of thread]

Dry-Lok is most likely the best thing although Enterprise and others do have waterproofing paint that can be used
on concrete block. I've used several and had no problems.
Regular block filler will not keep the moisture from coming in and will simply come off if moisture is a problem.
If the Dry-Lok comes off it is most likely not from moisture but from salt that is coming through the blocks.
This is can be cleaned up with a etching compound/muratic acid. The salt(elements) will cause the dry-lok
or any other paint to flake off of the wall. By using this muratic acid and a steel brush (use the brush before
the acid and not with it) this is the most recommended way of doing it. You can paint over Dry-Lok. Dry-Lok comes
in oil(oil is best) and latex so be sure to get the latex if you want to paint over it with latex.

Time spent preparing the wall is more important that what goes on it. Even the best paint cannot stick to a poorly prepared
wall. It is worth the extra time up front to prepare the wall.

Also, if mositure is a problem it is best to keep the water away from the basement. Dry-Lok etc. should be the last line of defense.

Hope all goes well,


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