From the last Pic if it's not the above did someone already try to recolor the grout prior and either it's wearing off or when the wipe off excess they removed some of the colorant leaving it inconsistant. If this is the case try a paint stripper like jasco and scrub the grout.
Bill Selik
Gourmet Stone Care
On Friday, October 23, 2015 6:09 AM, John Freitag <jfreitag@thestoneandtileschool.com> wrote:
The black color could be a result of someone crystalizing a floor while the grout was still damp or somewhat wet.
John E Freitag
John E Freitag
Owner/Director
The Stone & Tile School
Office 407-567-7680
Cell 407-615-0134
www.thestoneandtileschool.com
From: list-manager@stoneandtilepros.simplelists.com [mailto:list-manager@stoneandtilepros.simplelists.com] On Behalf Of Roger Konarski (via sccpartners list)
Sent: Thursday, October 22, 2015 9:42 PM
To: Stone Tile Pros
Subject: Grout Lines Turning Black
Sent: Thursday, October 22, 2015 9:42 PM
To: Stone Tile Pros
Subject: Grout Lines Turning Black
This email was sent from yahoo.com which does not allow forwarding of emails via email lists. Therefore the sender's email address (qm144@yahoo.com) has been replaced with a dummy one. |
I looked @ a job. White grout lines have a black residue on top. I can scratch away the black residue with a key. The question I have, why the black build up? See attached pitures.
Thanks,
Roger
Visit list archives, subscribe, unsubscribe or change your subscription
preferences:
http://stoneandtilepros.simplelists.com/sccpartners
Start a new conversation (thread):
sccpartners@stoneandtilepros.simplelists.com
Visit list archives, subscribe, unsubscribe or change your subscription preferences: http://stoneandtilepros.simplelists.com/sccpartners Start a new conversation (thread): sccpartners@stoneandtilepros.simplelists.com