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  1. #1
    Join Date
    Feb 2010
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    1

    Default adhesive stain on seam of Granite countertop

    We were lucky that the house we bought had slab granite tops already installed. The problem is that on the seam where two piece join there is a cloudy area. I think it must be the adhesive that is used to join the two pieces. You cannot feel it, but it looks cloudy. Is there a way to remove this? Thanks.

  2. #2
    Join Date
    Nov 2007
    Posts
    980

    Default Re: adhesive stain on seam of Granite countertop

    sorry but it probably isn't removable. sometimes if the seam is rough rather than making sure this problem doesn't exist before the put them together, they will try to grind the seam smooth then polish it back out. the problem is that this is very difficult and time consuming. and may even not be possible with some of the darker granites. and their attempt will leave the area cloudy looking.

  3. #3
    Join Date
    Nov 2007
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    980

    Default Re: adhesive stain on seam of Granite countertop

    Quote Originally Posted by Gizmo View Post
    It sounds like residue from the epoxy that was used on the seem. Ive seen installers use acetone to clean up after the seems been sc****d.
    clean up of the epoxy is done with denatured alcohol. not acetone, acetone would take any sealer off.

  4. #4
    Join Date
    Nov 2007
    Posts
    980

    Default Re: adhesive stain on seam of Granite countertop

    if you acetone to clean off the surface epoxy guess what it will do to the epoxy in the seam.

  5. #5
    Join Date
    Nov 2007
    Posts
    980

    Default Re: adhesive stain on seam of Granite countertop

    thats interesting since the seam is done on site. how could they install with out touching the seam? you bring the pieces on site then epoxy them together.

    of course a person is always welcome to follow the advice from someone who is simply googling the information over some one who actually does it everyday and owns their own company.

  6. #6
    Join Date
    Dec 2009
    Location
    Casper, Wyoming
    Posts
    159

    Default Re: adhesive stain on seam of Granite countertop

    If it were me, I would try sprinkling some baking soda and using a gentle scrubbing sponge and see if it will remove it.
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  7. #7
    Join Date
    Nov 2007
    Posts
    980

    Default Re: adhesive stain on seam of Granite countertop

    you bring two pieces of granite into the kitchen, you put them into place and shim trying to get the pieces level as well as get the two pieces to match as closely as possable. you run a piece of two inch masking tape on the face of the granite down each side of the seam as close to the edge of the cut as you can. you then mix your colorant with your epoxy trying to get a good color match. after you are satisfied with your color match you add your hardner to the epoxy and you take your tounge depressor or popsicle stick and run some epoxy down the edge of the granite makeing sure that you get to the full depth of the piece and fully coated. then using your seam tool you pull the pieces together this should cause the epoxy to squeeze out of the joint. your seem tool will still allow you to fine tune the leveling of your two pieces of granite before the adhesive sets. then taking a razor blade you wipe off the excess that has squeezed out. then when the epoxy has just about set you take a clean rag with some denatured alcohol and wipe the seam down smoothing out the epoxy. you then remove your tape. if this method is followed you don't end up with epoxy on the face of the granite but if you do after it is dry you simply take a razor blade and it will pop right off (it won't stick well to the polished surface of the face of the granite.) the problem then arises that the face of the granite may be smooth but the two sides don't always match up. one side may have a bow to it or one corner may stick up. this is a problem when shops don't match up their pieces at the shop before they take them out. some peoples answer is to "face polish" the two pieces over the seem to make it smooth across the seam which you can usually get away with, with lighter colored stones. but the darker stones have a higher reflective quality that makes this more time consuming and less likely to get good results. when polishing granite it is like sanding wood each grit takes out the markes of the grits before them but still leave marks from their grit. with granite polishing the grit is diamonds and they cut into the stone. each grit removing the marks from the previous grit but leaving smaller and smaller lines from the diamond grit. these cuts have a white appearence, when you get real fine these lines are no longer able to be seen as lines but appear collectively as a white fog especially if you have good lighting. some claim to be able to face polish dark granites with out leaving this fog but its like one of those phantoms that when ever challenged to show you they always have a reason why it can't be so "this time".

    this fog isn't epoxy on the face because you would be able to feel it if it were.

  8. #8
    Join Date
    Nov 2007
    Posts
    980

    Default Re: adhesive stain on seam of Granite countertop

    Quote Originally Posted by Gizmo View Post
    This thread was about stains on granite not installation techniques.... Looks like its a moot point since the original person that started the thread has posted back....

    Remember there's than one way to skin a cat......
    stains yes I use acetone on stains but then they need to be resealed but the question was a foggy area next to the seam and if it was epoxy on the face. a stain wouln't be a foggy area

  9. #9
    Join Date
    Nov 2007
    Posts
    980

    Default Re: adhesive stain on seam of Granite countertop

    and someone who has never done granite but simply knows how to use google probally won't be the one you want to listen to for advice on granite. unless you are also willing to pay for the grantie to be replaced if you give them bad advice.

  10. #10
    Join Date
    Mar 2013
    Posts
    1

    Default Re: adhesive stain on seam of Granite countertop

    You can use a sharp razor blade to remove the excess epoxy. Gently scrub the excess epoxy, once done, gently rub the surface using a soft cloth with small amount of acetone. If necessary you may apply poultice. But I still suggest you consult your fabricator to provide you with the appropriate type of poultice for your granite.

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