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Old 05-13-2014, 02:36 PM   #1
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thinset


I have a 4' by 5' area at the bottom of my stairs going to the basement that I want to tile with some ceramic tile. Problem is I have two bags of thinset, neither bag is enough to do the whole job but both together would be enough. One is a bag of Mapei floor tile thinset, the other bag is C-Cure Floor Mix 900, I can't see any problem in mixing the two together then mixing with the water to set the tile. It's a long haul to the nearest Lowes and I am just trying to save a trip.
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Old 05-13-2014, 02:59 PM   #2
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I've mixed various thin sets in the past and certainly see no problem here. The only question is; when was the material made, when did you buy it, when did you open the bags, and where has it been stored? Look for dates and codes on the bags.

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Old 05-13-2014, 03:01 PM   #3
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This is probably do-able but I wouldn't mix the two products together. Use them separately as they were intended. Dry-mixing the powders first could wreck the chemistry and render the entire quantity useless.

Keep in mind however that these products have a shelf-life and depending on how long you have had them and how they were stored they may be useless anyway. Thinset is inexpensive. If the products on-hand have been around more than six months I would trash them and buy new.
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Old 05-13-2014, 03:19 PM   #4
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Both bags of thinset are old, have no idea how old, but at least a few years. Both bags were rolled and sealed with duck tape. The powder is fine, dry, no lumps. Just wondering what can go bad? So, if I make another trip to Lowes or Home Depot what do you recommend?
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Old 05-13-2014, 03:49 PM   #5
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Quote:
Originally Posted by boilermaker27 View Post
Both bags of thinset are old, have no idea how old, but at least a few years. Both bags were rolled and sealed with duck tape. The powder is fine, dry, no lumps. Just wondering what can go bad? So, if I make another trip to Lowes or Home Depot what do you recommend?
Yow well.......don't kid yourself! The powder can "look" fine but can have already gone-off due to atmospheric conditions over time. It isn't worth it! Throw that stuff away and buy new. Both home centers carry good mainstream products.

There doesn't have to be any lumps for the product to be bad.
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Old 05-13-2014, 04:07 PM   #6
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Absolutely, take it to the curb on garbage day.

As Bud said, it doesn't have to be in lumps to be bad. Portland products have a shelf life of a year or so IF unopened and stored in a conditioned room off the floor if a slab. Once opened it's ok for a short time. How long? Who knows?

The bags have dates on them and sometimes they're half gone when you take it home. If Lowes is a long ride, try a friendly local hardware store, there's gotta be one nearby, no?

Jaz
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Old 05-13-2014, 04:23 PM   #7
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Ace Hardware carries a limited supply of thinset in this area.

Hi Jaz !
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Old 05-13-2014, 04:38 PM   #8
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just got back from Lowes with a new bag of Thinset, thanks for the help.
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Old 05-13-2014, 05:07 PM   #9
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Wise decision grasshopper.
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