WTH is this stuff.....

[WallsGa]

.....Coming out of the concrete pad in my garage? It appeared powdery at first but now looks more like mold.

 

[Freshly Minted Georgian!]

Efflorescence

 

[Flip853]

Efflorescence is the white powdery substance often seen on the surface of concrete or brick. Efflorescence is caused by water vapor migrating through the slab bringing soluble salts to the surface of the concrete. Many people mistake the white powdery substance with mold or mildew.

 

[41mag]

WTF ?!??

 

[Freshly Minted Georgian!]

It’s just mineral residue in the concrete leaking up to the surface due to relatively high water table at the site. It’s not particularly harmful, easy to sweep up. Problem is the underlying water table being high can cause other problems.

 

[eightnsand]

Hunters nose candy. DEA notified. I’m right behind em.

 

[payneed]

I'm leaning towards "the albino blob"...

 

[GAGunguy]

seal the floor with epoxy or not.

 

[Plinker66]

They sell efforescence wash at Lowe’s and Home Depot.

Maybe you are bringing salt in on your tires

 

[wolfmanrogers]

.....Coming out of the concrete pad in my garage? It appeared powdery at first but now looks more like mold.

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It’s Formunda.