Info on Weber.Col anhydrite 2 Gypsum based adhesive...

[Rich]

I have been using the Weber adhesive today, no problem at all to work with. The bags are suprisingly easy to lug around (didnt realise how used I had got to lifting 20/25kg) being only 15kg. Mixed up well, hard to describe but felt very fine but with gritty bits in it. I was using it wet as I was pouring with it, pours out nicely and hold the notches of the trowel very well as well as being nice and creamy to spread around. I was expecting to have limited time to work with it but if anything I would say that it wasnt going off quick enough but this may have been down to the fact that it was a cold and damp day.

I have left a little bit of mixed gypsum adhesive on the screed in a room that is not being tiled and I am going to leave a little bit of cement adhesive next to it so that I can see how much better the gypsum bond to the anhydrite screed than the cement.

So all in all a big thumbs up to the Weber gypsum based addy, I hope it is easier to get hold of soon as it is nice stuff to work with

 

[GiddyUpNeddy]

Could I ask which suppliers stock it and how much does it cost?
I have just looked a job (60 x 60 porcelain floor, appx 30m2, Under floor heating, anhydrite screed)
The client has had the floor laid twice by the same company and the tiles have blown completely. The company has now also gone bust!!
I was planning to strip everything off, cut out around the perimeter and install an expansion strip through the screed, scrabble the top of the screed,
prime as required and re-tile using Weber.set flexi. But, I would use the gypsum based addy if it is available.
Does anyone have anything to add to what I have planned?

 

[Qwerty]

I have left a little bit of mixed gypsum adhesive on the screed in a room that is not being tiled and I am going to leave a little bit of cement adhesive next to it so that I can see how much better the gypsum bond to the anhydrite screed than the cement.

So all in all a big thumbs up to the Weber gypsum based addy, I hope it is easier to get hold of soon as it is nice stuff to work with

Rich, how did they compare in the end?...... a long time ago I know, but interested to see as got an anhydrite screed job soon. Ta mate

 

[Ajax123]

N&C Nicobond are just about to launch their gypsum based adhesive to market. It is called Gypfix and will undoubtedly be in their distributors in the next few weeks. Site trials are being carried out as we speak. Also Creative Impressions are now looking at increasing their own distribution network so at last the industry looks like it is listening to the need for gypsum on gypsum.

I think the weber stuff has been temporarily withdrawn due to the French packaging

 

[Qwerty]

Doh! Cheers for that!

 

[DHTiling]

N&C Nicobond are just about to launch their gypsum based adhesive to market. It is called Gypfix and will undoubtedly be in their distributors in the next few weeks. Site trials are being carried out as we speak. Also Creative Impressions are now looking at increasing their own distribution network so at last the industry looks like it is listening to the need for gypsum on gypsum.

I think the weber stuff has been temporarily withdrawn due to the French packaging

Weber are going to make it in the UK.. should be out late this year to early next year.

 

[Daz]

I missed this thread first time round - Doh!
Yeah, I did around 80sqm of 600 x 600 porcelain with it at the beginning of the year. As Rich has said it is easy to work with, although you do need to clean your trowels regularly otherwise they will just get gummed up and trashed. I used it to stick tiles directly to the screed and to stick the "old style" Dural Ci in the wetroom.

I've got some pics of the coverage on the back of a tile and it is good; I'll try and find them.

But as Dave advises, the product is not actually available through the UK market yet so you'll need to source another manufacturer shorterm.

I will be trialing the N&C offering in approx 4 weeks time which I'm looking forward to. All the technical information and support that I have received from N&C to date has been excellent and I am satisfied that the product will perform well. I'll try and do a report once the project gets underway.

 

[Ajax123]

you changed your name Daz.......you speeded up a bit now then or what?? ;P

 

[Daz]

:lol: Alan, I thought Daz was more personal especially as that is how most regular contributors know me.

 

[Rich]

I had a chat with a Weber rep the other week and he told me that Weber were pulling their gypsum adhesive because they are very close to developing an adhesive that will bond to both cement and anhydrite screeds and they have had far to many people using it to tile onto sand and cement.

Geoff, I left that site before I could find out the results of my little experiment unfortunately.

 

[Anthony Rigby]

Firstly I'm a DIY'er if that makes any difference but I'm also an industrial chemist and this bonding to calcium sulphate screed is really interesting....I'll get my coat ;0)

After having a chat with Ajax I've plumped for the Gyvlon screed, 35 square meters laid by these guys... TW Pump Hire - Liquid / Flowing Screed Application (ps thats not an advert as I'm not connected at all but merely recommending them from experience)

It's been in a while now and we've had the wet UFH on so it should be quite dry. Now as a DIY'er trying to find somewhere that did Gypsum based adhesive was neigh on impossible however by luck creative impressions is located about 20 mins from where I live. I took a drive down there yesterday and picked up some bags of their GBTA along with some primer.

I decided for the sake of the short while to prime the surface after ensuring all the laitence had been removed. The primer looks very much like PVA although it did smell like it had some type of ammonia based compound mixed with it. Two coats of primer went on easily and was no issue at all.

I'll report back as to the use of the GBTA and my experiences once completed.

Two tilters type questions first if that OK?

I'm putting Tavertine 60x40 stone down, what bed size would you plump for? I was going to work on 3mm however I'm not sure if thats sufficient?

Also the room is open plan so I was going tile half of the room, move the furniture, kitchen units etc to the other half once tiled and allowed to dry and do the other half... will this be OK?

Cheers for now..

Ant

 

[Daz]

Hi Ant & welcome to TF,

Travertine, 35sqm & wet UFH.....have you considered a decoupling membrane too?
A decoupling membrane will eliminate any lateral movement and therefore reduce the risk of the stone cracking with the UFH.

How thick is the travertine? This will help advise the most suitable trowel size to use.

As far as furniture is concerned, you will be fine moving things around provided everything has dried properly. Just be careful with regards to scratching, sealing etc..

Good luck,

Daz