STAIN LEFT BY STAIN REMOVING POULTICE

[SUMMERS0094]

I JUST INSTALLED A COUNTER TOP MADE FROM BLACK GRANITE TILES.  1 WEEK AFTER WE SEALED IT WE HAD TWO STAINS APPEAR. ONE WAS A LEMON JUICE STAIN AND THE OTHER SEEMS LIKE A WATER STAIN. I PURCHASED A STAIN REMOVING PASTE POULTICE FROM HOME DEPOT AND APPLIED TO STAINS, COVERED WITH PLASTIC WRAP AND LET SIT FOR 24 HOURS. WHEN I WIPED OFF POULTICE I NOW HAVE A LARGER LIGHT COLORED STAIN WHERE THE POULTICE WAS ON THE TILE. I THOUGHT THIS WAS DUE TO THE POULTICE REMOVING SEALER IN THAT AREA SO I RE-APPLIED SEALER AND STAIN IS STILL THERE. DO NOT KNOW WHAT TO DO AT THIS POINT

[Mark D.]

First of all, Home Depot does not really carry any stone care products that a professional stone fabricator would use. You may be dealing with a stone that has been dyed or color enhanced.
Let's start with the wet look. When you wet the lighter area with water does it darken to the same shade as the rest of your stone?

Glad to be of service,
Mark

[Stone Dude]

granite is not black, what you have is most likely basalt. black absolute, etc. some of these basalts are very acid sensitive.

only two things could have happened. you either have a dyed stone, that was dyed to give it the black color, or it has etched. IF it has etched, this is the best scenario. if it is dyed, youre screwed. is the light spot still shiny like the rest of the counter top? if it is, it is a dyed stone and there is no fix. if it is dull, then it is etched (does not mean its not dyed either) and needs to be refinished by a professional. so far the only thing i can think of that would help the lighter area is Uniblack form Tenax which you can actually find @ DeFusco.

[SUMMERS0094]

YES. WHEN IT IS WET THE DISCOLORATION IS NOT VISIABLE. WHEN I RE-APPLIED SEALER IT WAS NOT VISABLE UNTIL THE SEALER WAS DRY AND EXCESS WIPED OFF

[Mark D.]

You need to respond to the stone dude's post before we can make any recommendations. Is the lighter part of the stone shiny when it is dry?

Mark

[SUMMERS0094]

I WILL HAVE TO POST RESPONSE TOMORROW. I AM AT WORK RIGHT NOW AND CANNOT REMEMBER IF STAIN IN DULL OR SHINY. WILL CHECK TONIGHT AND POST RESPONSE TOMORROW.

[SUMMERS0094]

AREA THAT IS STAINED IS STILL SHINEY AND JUST A LITTLE LIGHTER THAN REST OF TILE

[Mark D.]

Use Ager on the lighter part. It will give the stone the wet look so it matches the rest of the counter. It is also an impregnating sealer so you won't have to treat that part of the stone with anything else once you have used the Ager in that area. I would use a non color enhancing sealer like Hydrex on the rest of the stone.
Here are a couple of links
Ager:
http://www.defusco.com/Glues:-Epoxy,-Polyester,-etc.-Ager-Sealer-&-Ager-Tiger-Sealer/c82_503/index.html

Hydrex:
http://www.defusco.com/Glues:-Epoxy,-Polyester,-etc.-Hydrex-Sealer/c82_502/index.html

Glad to be of service,
Mark