Tilemaster Ditra And Anhyfix

[F430]

Hi there, after some general advice here.

Just laid the the first time some ditra matting onto a anhydrite floor using TileMaster Anhyfix.

Did all the prep IE sand floor vacuum prime etc, all went well or so i think ??

So question how well should the Ditra stick to the Anhyfix ??

The reason why i ask is i have tried in a test area and to my surprise the Ditra comes up quite easy like it has not bonded at all to the adhesive.

The adhesive has stuck very well to the floor but not the Ditra mat?

I know it is an uncoupling membrane but surely it should stick to the adhesive ??

Getting a bit worried now, can anyone offer some advice ?

 

[Spud]

how loose did you mix it up and did you use a roller or block of wood to rub it in to the adhesive ?

 

[Time's Ran Out]

Just done exactly the same prep and didn't have an issue. Found the adhesive to be really good.
Have to admit though I didn't even try to pull any up!

 

[J Sid]

not used Anhyfix, does it skin over quickly?

 

[F430]

how loose did you mix it up and did you use a roller or block of wood to rub it in to the adhesive ?

I mixed it as per the instructions, was a good mix Ie not thick and not runny I used a grout float to push the mat into the adhesive, i pushed really hard and went over it 3 times in different directions and i ain't a light chap ! The floor is very flat and it all seemed to go on very well, I did pull a few parts up when laying to make sure i was getting full coverage.

My concern is over how long the supplier had the Anyfix for as the bags do look like they have been in the warehouse a while.

 

[F430]

Some photos if they work.

 

[Time's Ran Out]

not used Anhyfix, does it skin over quickly?

It's really good and it won't skin over within a couple of minutes it takes to lay the Ditra.
It's a very creamy adhesive but went off quite quick and hard.
Seemed like a good combination to me.

 

[LM]

I can't understand why Schlutter won't recommend an adhesive for sticking down Ditra to a dry screed like they do with af200 on ply. I've fitted thousands of metres of stuck down carpets direct to screeds and believe me when I tell you they stick like sh*t, you try pulling up a needle punch carpet that's been stuck down, you have to cut it into 4-6 inch strips, use a clamp and pull with all you've got to get it up, so I can't get why you can't stick Ditra to a screed with an acrylic adhesive 😡

 

[Time's Ran Out]

Only suggestion is check the bags for date of manufacture.

 

[F430]

Only suggestion is check the bags for date of manufacture.

All i can see is a batch number which is 24021605

 

[J Sid]

I can't understand why Schlutter won't recommend an adhesive for sticking down Ditra to a dry screed like they do with af200 on ply. I've fitted thousands of metres of stuck down carpets direct to screeds and believe me when I tell you they stick like sh*t, you try pulling up a needle punch carpet that's been stuck down, you have to cut it into 4-6 inch strips, use a clamp and pull with all you've got to get it up, so I can't get why you can't stick Ditra to a screed with an acrylic adhesive 😡

you can use AF200 on screed to stick Ditra

 

[LM]

you can use AF200 on screed to stick Ditra

I asked Schluter about this on the phone and they told me categorically no, hence my post

 

[LM]

I asked Schluter about this on the phone and they told me categorically no, hence my post

By no means I'm I claiming to be an expert about it, I'd just like a definitive answer from Schluter, in my opinion there's no comparison with the 'grab' of acrylic vs cemitisious on fleece like materials

 

[Ian]

All i can see is a batch number which is 24021605

Could that be 24th Feb '16? Batch number 5? All the tilemaster products I've used have a production date on them.

 

[LM]

View attachment 81893
you can use AF200 on screed to stick Ditra

What do you use on screed then Julian? I'd respect your opinion.

 

[Stef]

I find with Anhyfix you need to let it slake & add a bit more water when you remix it.
It's a great adhesive to use.

 

[WetSaw]

"Slake"? Is that a Scottish thing?

 

[Stef]

"Slake"? Is that a Scottish thing?

Official term for letting it stand for 5 minutes before you do your final mix.
It's Defo not a Scottish term.

 

[WetSaw]

Every day is a school day!!

 

[One Day]

I am using Anhyfix to fit 300sqm of Ditra onto anhydrite screed.
I found it to be brilliant - stickiest powder adhesive I've ever used.
Schluter said NO to using it as they've not tested it in the labs but I know it's a winner.

 

[Stef]

I've never used it to fit Ditra but I've done a few m2 of tiling with it & it sticks like the proverbial.
I've a few bags left in the garage & need to use them up before they go out of date,

 

[F430]

Thanks for the replies.

I can confirm that the Anhyfix does stick like s**t to a blanket but not to the fleece on the back of the ditra!

I take it not many who have used it for Ditra have tired to see what it sticks like IE a peel test ??

I took a video this morning of a corner under where the log burring is going and i peels of like duct tape would do, you can see by the photo that the mat has left an imprint in the adhesive but it has not adhered very well to the fleece.

 

[Italy]

I find with Anhyfix you need to let it slake & add a bit more water when you remix it.
It's a great adhesive to use.

add a bit more water when you remix?
add water. during remixing. (second mixing. after 5/10 minutes)
did I get it right?

 

[Stef]

add a bit more water when you remix?
add water. during remixing. (second mixing. after 5/10 minutes)
did I get it right?

As with any modified adhesive you should be mixing it twice to let the polymers break down.
1st mix, let it stand (slake) then remix.
Anhyfix wants more water at this stage than any other adhesive I have used.

 

[Stef]

Thanks for the replies.

I can confirm that the Anhyfix does stick like s**t to a blanket but not to the fleece on the back of the ditra!

I take it not many who have used it for Ditra have tired to see what it sticks like IE a peel test ??

I took a video this morning of a corner under where the log burring is going and i peels of like duct tape would do, you can see by the photo that the mat has left an imprint in the adhesive but it has not adhered very well to the fleece.

I would be concerned about that tbh.

 

[Italy]

As with any modified adhesive you should be mixing it twice to let the polymers break down.
1st mix, let it stand (slake) then remix.
Anhyfix wants more water at this stage than any other adhesive I have used.

Yes. I know. (I studied much) lol.
but you said. add water. while Remixe.
this operation. add the final water. not prove to be possible. (Incompatibility). it's possible . if after water. add even. adhesive powdered.
sorry intrusion. but that's what. They explained to me. in the first courses.
ps. mapei courses. (Maybe wrong) lol

 

[Stef]

Yes. I know. (I studied much) lol.
but you said. add water. while Remixe.
this operation. add the final water. not prove to be possible. (Incompatibility). it's possible . if after water. add even. adhesive powdered.
sorry intrusion. but that's what. They explained to me. in the first courses.
ps. mapei courses. (Maybe wrong) lol

You add water at the second mix after you let it stand for a few minutes.

 

[One Day]

Mine takes some effort to get up but it will come up. There's enough grab it doesn't worry me. Other adhesives do just the same. Remember, it's supposed to be a weakish bond.

 

[J Sid]

Mine takes some effort to get up but it will come up. There's enough grab it doesn't worry me. Other adhesives do just the same. Remember, it's supposed to be a weakish bond.

why is it supposed to be a weakish bond?

 

[One Day]

why is it supposed to be a weakish bond?

So that the fleece can stretch and tear - first defence before the dovetails and plastic start to stretch. I was told that's the reason for using a very thin bed. We've all heard stories of ditra being fixed with all kinds of weird stuff, even upside down. If it's stuck to the floor and the tiles are well anchored into the holes, it's going to work fine.

 

[J Sid]

So that the fleece can stretch and tear - first defence before the dovetails and plastic start to stretch. I was told that's the reason for using a very thin bed. We've all heard stories of ditra being fixed with all kinds of weird stuff, even upside down. If it's stuck to the floor and the tiles are well anchored into the holes, it's going to work fine.

I would expect the fleece to be anchored firm to the floor with your chosen adhesive, so much so the fleece would come apart from the plastic when lifted and the adhesive holding the tiles should not stick at all the the plastic top.
may be wrong, wouldn't be the first time 😉