Cure time for concrete patch

Discussion in 'Remodel Forum & Blog' started by Mike50, Sep 3, 2006.

  1. Mike50

    Mike50 DIY Senior Member

    Messages:
    699
    Location:
    Southern California
    I am repairing a 12 foot crack in foundation before I lay down vapor barrier for wood laminate install. I'm using commercial grade Quikcrete (yellow tub)

    What do you think the cure time would be before laying down the plastic vapor barrier??

    M.
  2. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    Depends on the width and depth of the patch. I would probably call the manufacturer. The product will set up in very short order, but how soon you can cover it with a vapor barrier is a different story..
  3. Mike50

    Mike50 DIY Senior Member

    Messages:
    699
    Location:
    Southern California
    confused about application

    OK. I've never done this before.
    This Quickcrete product instruction says to only mix enough to use in 2-3 minutes. I'm supposed to roll it in my hands and apply.

    That's a lot of batches for 12 foot crack. It's about 1/8 inch Jim.

    Did I buy wrong product?
    I explained situation and store manager told me to buy this.....
  4. prashster

    prashster New Member

    Messages:
    941
    Latex modified mortars/concretes require oxygen to cure. If that product is unmodified then the vapor barrier will not impede the cure. If it IS latex modified, then it'll adversely affect the curing.

    The MSDS for that product says '48 hours of damp curing' recommended; check the Quikrete website.

    Fast setting stuff is usually appropriate for walls and overhead work where you can't afford sag or drip. But don't confuse fast-setting with fast-curing.

    I'd return the tub for a sack of dry, medium setting concrete patcher - one that's entirely sand and cement (no aggregate). It'll trowel and feather beautifully.
    Last edited: Sep 3, 2006
  5. Mike50

    Mike50 DIY Senior Member

    Messages:
    699
    Location:
    Southern California
    OK. I'm returning this tomorrow. This the wrong product which is the 2nd bad recommendation from slowes store mgr.

    This is primarily for fast fixes-underwater etc..

    Any other recommendations for 12 foot X 1/8 inch concrete crack.
    It has to be a fast curing time. I need to put down my vapor barrier/laminate soon (within one to two weeks.) If at all possible.
    brand name would be helpful

    thanks
  6. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,273
    Location:
    New England
    The question comes to mind, why do you care? If it were something like tile, that crack would need isolation, the laminate doesn't really care. The board on www.johnbridge.com gets a lot more traffic. They tend to think in lines of an isolation membrane rather than trying to fill a crack, since it can often break again on its own, though. They have people that do both, though (it is primarily tile).
  7. Mike50

    Mike50 DIY Senior Member

    Messages:
    699
    Location:
    Southern California

    Well I didn't know that. Thanks. Others I've spoken to have said that when and if moisture/water reaches underneath the slab then THAT (the crack) will be where it comes up.

    I see your point-it makes sense to me truthfully. And frankly I would like to not have to deal with sealing this 12 foot crack at all.


    Maybe I've been getting mediocre advice on this issue Jim.
    Regarding water issues FWIW and as I've mentioned I DO live in the most arrid city of anyone here.
    High desert of SoCal.
  8. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,273
    Location:
    New England
    If anything, I'd fill it with maybe silicon, put down my vapor barrier (which is typically required for that kind of flooring), and start putting it together.
  9. Mike50

    Mike50 DIY Senior Member

    Messages:
    699
    Location:
    Southern California
    just spoke with a flooring guy and guess what he said:

    "you dont need to do anything really...unless you want to put some silicone in there because of your vapor barrier...";)

    that saved me some headaches. thanks again Jim You da man..


    cure time on silicone is pretty fast isn't it....?
    It's going to be a little tricky getting it in where the crack narrows...
    Last edited: Sep 7, 2006
  10. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    22,273
    Location:
    New England
    Do it today, cover it tomorrow...It won't be fully cured, but you don't really care. Most say 7-days, but you aren't really trying to waterproof things in the desert, but maybe keep ants and termites at bay. The top won't be sticky anymore overnight.
  11. Mike50

    Mike50 DIY Senior Member

    Messages:
    699
    Location:
    Southern California
    Followup:
    I returned the Quikcrete and
    just finished
    filling that huge crack and it only took 1/2 hour. I used a 24 hour cure *Silicone 2 for concrete and masonry*. Spreads like buttah with a caulking gun & putty knife. Floor goes down on Tuesday....so it's all good. Thanks again Jim.

    I don't know how that dood became store manager of slowes. The guy hands me this product used for emergency water patches. The kind of stuff you can use under water.
    ...and I don't recall telling him I needed to repair an oil derrick 20 fathoms deep in the pacific ocean....

    regards,

    Mike
    Last edited: Sep 17, 2006
Similar Threads: Cure concrete
Forum Title Date
Remodel Forum & Blog Ceramic Floor tile adhesive cure time Jul 1, 2011
Remodel Forum & Blog Level cure and bigger tiles Oct 23, 2007
Remodel Forum & Blog best tile to concrete cement Jul 1, 2014
Remodel Forum & Blog Best way to frame concrete half wall in daylight partial exposure basement? Mar 12, 2014
Remodel Forum & Blog cutting and patching a lower square in my basement concrete slab for treadmill Sep 28, 2012

Share This Page