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    Re: Post Concrete Block Installation

    3 posts, 0 answered
    1. pmemon avatar

      Three weeks ago I sprayed two coats of Xypex Concentrate on my basement walls.  I had the typical problem - post rain the blocks will 'weep' water and sometimes puddle on the floor.  I followed the directions to a 'T' - prepped properly, wet the walls and then kept them wet post install for three days.  I got the big test this past week when we got 6 inches of rain in less than 24 hour.  While there was definitely a big improvement there was still seepage and the brick surface was wet in many areas.  Should I just wait it out and continue to let Xypex permeate and the crystals grow or should, can I even, put on another coat of Xypex?    Is it even possible to put another coat of Xypex on an existing installation?  Thanks in advance!!
      Posted on 02 May 2014
    2. Jim Caruth avatar

      Jim Caruth
      Dear Pmemon,
      Our apologies for the wait. We have been having some web site challenges.

      When it comes to CMU there are no hard and firm rules as the permeability of CMU varies greatly by region.

      Xypex Concentrate will certainly improve its performance with age. Will it be enough to fully waterproof the assembly……hard to know. If it is not the Xypex Concentrate can be over coated with Xypex Megamix I as a cap coat that normally solves any additional leakage issues. I generally suggest that the customer contact the local Xypex representative and ask how it is done in that particular region and get guidance on how to proceed further.

      I trust that this helps and again, sorry to keep you waiting so long.
      Posted on 13 May 2014
    3. pmemon avatar

      Hi Jim,

      Thank you for the reply!  One more quick question - can the Megamix be applied after the Concentrate is no longer 'green' (i.e. weeks after the initial Concentrate installation)?


      Posted on 13 May 2014

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