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Old 11-14-2017, 01:36 PM   #1
houndzilla
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Mapei Mapecem Quickpatch

I had an opportunity to use a couple bags of this product over the weekend. Searches on the forum don't really show anything for it, so I figured I write about it a little.

I've never used a patching product like this before. Pretty impressed with it, I can't believe at how well it sticks to a plastic bucket when dried. I selected it because I have no vapor barrier under my basement slab and it's an interior/exterior product that doesn't have moisture or vapor limitations. It's going to pull triple duty as a skimming, ramping (under ditra), and low spot filler for my SLC to minimize the depth of the pour.

First bag was rough coat to patch a concrete trench and saw cuts, and do some eyeball slope adjustment of the floor. Second bag was carefully measured out to clean up feather edges, and do a final skim to clean everything up.

This was a furnace room and the already ground concrete slab was just getting SW Armorseal Treadplex paint. So it didn't need to look terribly pretty.

Some takeaways:
  • My initial impression of what SSD (saturated surface dry) means was wrong and it hurt the workability of my first coat. I understand better now.
  • This stuff likes to be at the high end of the water ratio, at lower water ratios The product is so sticky that it's difficult to work with a trowel. It might work if you are ramping and are able to screed though.
  • Very short working/open time, try to be wrapping up between 5-10 minutes after finishing mixing.
  • Around 30 minutes you can start to hard trowel the finish or knockdown ridges with a drywall knife. If you want to do a broom finish that could probably be done around 20-25 minutes.
  • My final skim I added an extra but of water (maybe 3.4:1) and really saturated my floor. I was really happy with the outcome and it's ability to feather to zero.
I'm looking forward to tackling the laundry room next with the familiarity I have now with this product.
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Old 11-14-2017, 02:52 PM   #2
Cain
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I use it quite often.
It's pretty awesome for quick patching of low spots.
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Old 11-15-2017, 06:06 AM   #3
tilemanct
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If you really want to add to that experience switch from Ditra to Mapei's UM Underlayment. You'll never look back!!
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Old 11-15-2017, 08:41 AM   #4
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Thanks for the write up. I have a patch job coming up also and the rep recommended QuickPatch. Will see how it works.
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Old 11-15-2017, 11:39 AM   #5
houndzilla
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Quote:
If you really want to add to that experience switch from Ditra to Mapei's UM Underlayment. You'll never look back!!
Dave, I would love to but 1)I'm using Schluters heated floor system 2)my architectural product rep hooked me up with some pricing that would make your eyes water.

I have some concerns about the shrinkage cracks in my my 50+ year old slab and Ditra crack bridging ability. I have some ideas on how I'm going to address it, but I would love it Ditra would test/rework their product meet whatever ANSI spec is for crack isolation.
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Old 11-20-2017, 08:25 AM   #6
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George, thanks for the kind words about our Mapecem Quickpatch product (and Dave, thanks for the nod on Mapeguard UM). You're right about the water ratio, we list a wider range than we might otherwise because the product is used for a variety of purposes. It's a great patch for anywhere that moisture might be an issue such as below grade, under membranes, and outdoors.
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