tree55

First off thx so much for any help. I had a contractor install an ariz flag path which I was told was sealed w/ 511 Impregnator. I believe it was because the stone came out MUCH darker then original stone . After two weeks this gorgeous natural stone is turning almost completely ivory (though not powdery on surface - may be coming up from below sealer). See attached photo. Q's- How can I: - tell if this is indeed Efflorecence? - remove, restore the stone to it's pre sealed state? - make sure this whitening does not re-appear? thx again

thx craig

thx craftonhill

thx CraftonHill, are there any sealers you like for flag (i.e Aldon)? e

thx craig, to your q's: - If it was efflorescense you could broom it off. Can you do this? NO Is it powdery? NO If you put water on it does it temporarily disappear? IT DARKENS TEMPORARILY BUT EVENTUALLY COMES BACK TO THA CHALKY STATE.

It does not really look like crystals since the white portions are way to uniform. But may look like the sealer may be discoloring. What can i do about this if this is indeed the case? thx again for all your help e

The flag went down on 11/29/08 and it started turning white about a week after. Do you all think it's effloresence? And if so will it be able to cure itself out thru the sealer?