Mapei Mapecem Quickpatch

Discussion in 'Floor Preparation' started by George_M, Nov 14, 2017.

  1. George_M

    George_M Pro Member

    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 (3.5:1), at lower water ratios (4:1)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.

    Technical Data Sheet & MSDS for Mapecem Quickpatch here.
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  2. Mike Antonetti

    Mike Antonetti I Support TFP Senior Member

    I’ve liked that product ever since it came out. Very quick drying, deep filling, easy forming at proper window, if you wait too long I’ve used side of trowel to scrape excess. It’s weird sticky, some drips I say how the hell can it hold so well. I carried a bag of it onboard for unexpected deep fills and had my distributor stock 4 bags onhand or an order would take a week.
  3. kylenelson

    kylenelson You'll find me on the floor I Support TFP Senior Member

    I love that stuff, great for deep fills and also good for outdoors. It’s really great for being trowelable and tough at the same time
  4. Andrew Batory

    Andrew Batory Installer

    Thanks for this post, and especially the detail, I've been looking at alternative to my ardex feather finish for economic reasons. I will be trying this out now. Also nice that it doesn't need a primer.
  5. Mark Brown

    Mark Brown On The Surface Flooring I Support TFP

    It isn't the best for skimcoat patching in my honest opinion. If price is holding you back from the ardex give the North American Adhesivea version a try. It's mapei''s white label and it is not too bad. I find it isn't as smooth as the ardex but for skimming it isn't too bad either and at about 14 dollars a bag I can tolerate a little let down compared to 20
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  6. kylenelson

    kylenelson You'll find me on the floor I Support TFP Senior Member

    This is nothing like ardex, think more concrete like. Not good for skimcoats.
    • Agree Agree x 1
  7. Andrew Batory

    Andrew Batory Installer

    grrrrrr back to the drawing board.

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