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Unread 04-26-2020, 05:44 AM   #1
Skyace777
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Schluter All Set Limited Pot Life

Hi Guys,

Been using Schluter All Set over Ditra and seem to only be getting maybe 90 minutes pot life. Using max suggested 6.5 quarts water and mixing 5-10-3. The consistency is perfect for like the first hour and then starts to go downhill. I use my margin trowel to remix periodically.

Any ideas? Should I mix it slightly faster? I'm using the Ridgid paddle mixer.

Thanks!
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Unread 04-26-2020, 07:55 AM   #2
Gozo
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Sounds about right. Make sure you follow the mixing directions and allow it to slake and then remix. Very warm or dry room conditions cause it to setup quicker. Though pot life should be more like 2 hours+ according to Schluter, I’ve never quite gotten the package claimed pot life.
My recommendation is to either work faster or mix smaller batches. I’m notoriously slow, so I go the latter route.
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Unread 04-26-2020, 10:02 AM   #3
Davy
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I'm with Jeff, the weather conditions have a lot to do with it. Make sure you mix with cool water and keep the thinset bags in the shade. If you're using water from a garden hose, run the hot water out of the hose.
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Unread 04-26-2020, 01:23 PM   #4
Skyace777
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Thanks guys.

I'm in South Florida so it's hot and humid. Been storing the bags of mortar on my covered porch wrapped in tarps. No direct sun.

The water I use is room temp from the spicket outside.

I'd consider using half a bag at a time but I'm concerned I may not get the water ratio right.
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Unread 04-26-2020, 02:51 PM   #5
Tool Guy - Kg
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As long as you’re not adding any water, feel free to give the mortar a twist with your mixing paddle for a minute or so.
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Unread 04-26-2020, 02:57 PM   #6
jadnashua
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I know a lot of people eyeball the mixing ratio, but I still prefer to weigh the stuff out. Measuring the water is the easy part. Something like a luggage scale works with a bucket handle and can be found pretty cheaply these days.

Some thinsets just don't give a real good indication until poof, magic, it all comes together near the end of the mixing.
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Unread 05-09-2020, 03:39 PM   #7
Skyace777
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So on a related note, what mortars do you guys like to use to set tile on DITRA? What's the preference?
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Unread 05-09-2020, 07:52 PM   #8
Lou_MA
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Loved ditra set but can’t get it anymore. Now I’m Laticrete 317 or 272. Or Mapei Kerabond
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Unread 05-10-2020, 06:27 AM   #9
jondon
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I too was a big fan of 317 since they wanted unmod over ditra. I have tried the All-SET now a few times and noticed it doesn't have a great pot life compared to others. I just noticed they make FAST-SET as well which I haven't come across. Since ALL-SET is modified I have switched over to 253 though I would still use 317.
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Unread 05-10-2020, 09:52 AM   #10
cx
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Haven't tried the new All-Set, but I liked Ditra-Set. Haven't tried to purchase any for some years, though.

If forced to use an unmodified on Ditra, 317 would likely be my first choice, too. Here's my old, oft posted, 317/Ditra test from the CTEF many years ago.

Name:  Removing Tile From Ditra.jpg
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Unread 05-10-2020, 04:29 PM   #11
Lazarus
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Guess I've been doing it for so long, I mix, add water, mix, add powder to get to the consistency I want..... Never failed me yet (but the day is young...)
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Unread 05-10-2020, 05:12 PM   #12
jondon
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Quote:
posted by CX:
317 would likely be my first choice, too.
Another great reason to use 317 is cleaning the next day, no I don't keep my tile perfectly clean and especially if I am using the a tuning system it's inevitable you will have to clean out some joints. Another plus.

I once used 317 to set a marble shower many moons ago. True story. I was out of 253 went with it. Guess what, you would never know because the shower is still pristine so I think we over-modify our discussions sometimes on modified thinset.
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Unread 05-11-2020, 07:11 AM   #13
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Kerabond is a good one too. They now have Kerabond T for large format tiles.
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Unread 05-11-2020, 09:36 AM   #14
tilemanct
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Switch out to Mapei UM Membrane and all your problems are solved. Your choices of Thin Sets becomes almost unlimited and no warranty problems. Wish Schluter would have used ANSI specs instead of going into the thin set business.
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Unread 05-11-2020, 11:32 AM   #15
jadnashua
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The EURO specs seem to have information about whether the modifier needs to dry to attain maximum strength, but if the ANSI ones do, I'm not aware of it. The big issue is whether the modifier needs to dry or not to attain suitable stability and strength. Many today would qualify, but it's not that easy to tell.
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