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    Re: Coating over xypex treated concrete

    3 posts, 0 answered
    1. Noliner avatar

      Noliner
      New pond was blown using Xypex treated admix.  It was not finished properly and a top coat was desired for esthetic reasons.  A cementous waterproofing parge coat was applied 7 days after the initial pour and it failed.  This was then pressure washed off and we're looking for the correct product and procedure to provide a smooth durable surface with the desired color (tan).  Any help would be appreciated.  
      Posted on 05 Apr 2014
    2. Jim Caruth avatar

      Jim Caruth


      I expect that you are looking to apply a thin coat of
      material say in the range of 1/8” – 3/8”. 
      In this instance I would suggest you use Xypex Megamix I mixed, per the instructions,
      with Xypex Xycrylic admixture.  The
      substrate should be prepared to a CSP 3 which is the equivalent to a heavily
      sandblasted surface.  This can be
      achieved in a number of ways but a 5000 psi pressure washer, and if required a
      grit introduction nozzle in conjunction with this, should do it.

      If you need to apply a thicker coating, Xypex Megamix II can
      be used for a layer of ½” – 2”.  Again
      use Xypex Xycrylic mixed at 1 part Xycrylic to 2 parts water as the mix
      liquid.  In this instance you may need a
      slightly higher surface texture.

      The substrate should be saturated surface dry just prior to application
      of the top parge coats.  Apply a scrub
      coat to the substrate then the mortar.

      Neither of these top coats need to be cured unless you are
      in extremely dry conditions.

      Call me at 604-273-5265 if you want to discuss further.  Jim Caruth

      Posted on 07 Apr 2014
    3. Jim Caruth avatar

      Jim Caruth
      I forgot to add, both of these materials can be tinted with the powdered oxides normally used to colour cement based materials.  You will need to do some playing with oxides and the mortars to get the colour you want.
      Posted on 07 Apr 2014

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