Hardie Primer before installing Kerdi

Discussion in 'Shower & Bathtub Forum & Blog' started by Lunker, Jan 18, 2013.

  1. Lunker

    Lunker New Member

    Feb 15, 2008
    I read somewhere that spraying the hardie board with a "level-quick primer" before installing kerdi it will make things a lot easier because the hardie will then not suck the moisture out of the thin-set.... can anyone second this solution?
  2. jadziedzic

    jadziedzic Member

    Aug 4, 2006
    New Hampshire
    I used Laticrete's primer on the Durock in my shower prior to installing the Kerdi; I believe I applied two coats a day apart. There were no problems with the thinset drying out too quickly, and since this was my first Kerdi project I'm sure I took a LOT longer than an experienced installer.
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  4. nukeman

    nukeman Nuclear Engineer

    Nov 20, 2009
    Nuclear Engineer
    I used the primer on my cement board also before the Kerdi. I did one coat. Seemed to work fine. Didn't have issues with the thinset drying out.
  5. Lunker

    Lunker New Member

    Feb 15, 2008
    Thanks guys.

    I sprayed the hardie with primer,let it sit for a few hours and then installed the kerdi. I'm a first time installer, and it went smooth as silk, no drying out of the thin-set and no air bubbles. I was honestly worried about the install, but it was easy as pie.... :)
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