Cleaning and sealing pietra cardoza

Hi Maurizo--We have brand new pietra cardoza kitchen counters. The installer sealed them twice. Can I seal them again with your MB4 sealer? I ask because we left some onion juice or something on them overnight and the spot is now yellow and I'm scared the sealer just isn't enough as is. Also, any ideas how to get out the yellow stain? Thank you.

 

Dear Meredith:

Pietra di Cardoso, huh… :-(

Probably sealing them twice was not enough (do read the free article about a good sealing job at: http://www.marblecleaning.org/helpful-hints.htm), and that does not mean that the impregnator they used was no good. In fact, it would not be a good idea using MB-4 after whatever else they used, because some times different impregnating sealers are not compatible to one another. So, your best bet is to finish the sealing job with the same product you started with, assuming that's the best possible sealer for that particular stone. (Quite honestly, I don't even know if MB-4 is the right impregnator for that stone.)

Having said all that, I must now add that no matter how well sealed your stone will become, if you let some staining agent sitting on it overnight, it will stain!

And this is not limited to the Petra di Cardoso, but to any stone that can be sealed. Impregnators, a.k.a. sealers, only make the stone stain-resistant, never stain-proof.

However, removing an organic stain like the one you have is no biggie.

When it comes to stain removal, either you buy one of those expensive “Professional kits” (that no true professional ever uses!) at a stone retailer near you, or you can spend less money and get our comprehensive guidelines on how to remove stains by using inexpensive and far more effective means that you may already have in your household! Such impressive piece of literature will also tell you how to tell stains apart from “stains”, and what to do about the latter! It does carry a small price tag, and you can order it by logging on at: http://www.marblecleaning.org/literature.htm.   It's available in pay-per-download format and it's much cheaper than any kit on the market! Not to mention the little and much needed support you'd be giving to the cause – your cause - since every single penny of the cost of the article will be used to support it.

Also, will you please read and e-sign our Statement of Purpose by logging on at: http://www.marblecleaning.org/purpose.htm? By spreading the word about this valuable site among your friend & family and the stone trades' people you've been dealing with, you will be rendering everybody a valuable service!

Ciao and good luck,

Mauri z io Bertoli

 

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