Posted by: Jeff on November 13, 1999 at 23:18:24:

In Reply to: dark colored block Posted by: Dan Vargo on November 13, 1999 at 10:01:15:

: I am considering buying a house that is built on a foundation. In some areas of the basement the block is darker (wet looking). It is not wet to the touch. Also in some areas there is a white chalky material. Since there is never actually water in the basement is there a way to treat the block to take care of the appeareance problem?

Dan
The white deposit is probably efflorescence and can be removed with a muriatic acid and water solution about 1 part acid to 10 water. After the block have been cleaned you can apply thoro seal a portland based sealer to even out the color and prevent any water seepage.
Jeff

Followups::

: : I am considering buying a house that is built on a foundation. In some areas of the basement the block is darker (wet looking). It is not wet to the touch. Also in some areas there is a white chalky material. Since there is never actually water in the basement is there a way to treat the block to take care of the appeareance problem? : Dan : The white deposit is probably efflorescence and can be removed with a muriatic acid and water solution about 1 part acid to 10 water. After the block have been cleaned you can apply thoro seal a portland based sealer to even out the color and prevent any water seepage. : Jeff

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