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Discuss granfix grout patching in the Australia Tiling Forum area at TilersForums.com.
Efflorescence. Granfix is known for it. You have left too much water on the grout surface and its caused it to dry patchy.
Agree with that. I hate the stuff. Generally you are ok with the White and limestone , but the greys in particular are known for going really patchy. And I don't like the charcoal as I think it dries too light to be called charcoal !
I have to use it as it's what's supplied with the work I'm doing at the moment. But me and the other tiler have been on at the supplying showroom to change grout brand to something we can trust !
Reply to granfix grout patching in the Australia Tiling Forum area at TilersForums.com