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Discuss Gypsum based adhesives in the Tile Adhesive / Grout Advice area at TilersForums.com.
I've used Norcross tile to gypsum, Nicobond gypfix, Granfix csa and Tilemaster anhyfix. No failures and there shouldn't be if used correctly and not in wet areas. Also used Kerakoll h40 ideal which isn't a gypsum adhesive as such but is suitable for anhydrite screeds.I as yet have not been brave enough to use a gypsum based adhesive on an anhydrate screed just wondering has anybody on here used them and if so how they have found them and most importantly any failures.
I never trust adhesive manufacturers fully as I have seen lots of failures on some of their products like 2 part flexible rubber crumb adhesive. And having been dumped on by bal over grout which dried out grey instead of limestone but they still claimed it was in the expected colour spectrum . So I would prefer to others who have used the product and as you know you learn more when you have problems than when everything goes perfectlynot used directly but have recommended for at least 8 years now. seen dozens of failures with cement adhesives in that time. on the other hand have only seen 2 failures with gypsum adhesive over the same period. both of those were easily explained. I don't know why you think using gypsum adhesive is a brave thing to do. It seems just common sense to me. cement on cement and gypsum on gypsum...
Why would you have to go the cement based route with a decoupler Jon?A gypsum based adhesive is fine if it is mixed correctly and the screed has been properly prepared and is dry. However if the gypsum screed has UFH in it as many of them have, then I would recommend decoupling it, so you would have to go down the cement based route.
Reply to Gypsum based adhesives in the Tile Adhesive / Grout Advice area at TilersForums.com