Browse Forums Bathrooms and Laundry Re: Black tile, black grout, efflorescence or something else 11Jun 21, 2013 9:42 am It certainly is not efflorescence from the pics you have shown. It looks like the shower does not drain that well and water just sits in the grout joint causing hard water just like a shower glass door and you only see this on dark coloured grout. I would not re grout way to messy and can ruin your tiles. Colour sealing is your best option well the only option here. Thanks splashers, that makes sense. The waterproofing guy used this Davco product, I will raise the issue with builder and hopefully get resolved with him - if not… 2 12896 I work with owner, he/she is my man on the ground and I instruct them when to visit the site and take photos and I have other tools in the bag. 4 15284 |