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Thread: Hardie Primer before installing Kerdi

  1. #1
    DIY Junior Member Lunker68's Avatar
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    Default Hardie Primer before installing Kerdi

    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. #2
    DIY Member jadziedzic's Avatar
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    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.

  3. #3
    Nuclear Engineer nukeman's Avatar
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    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.

  4. #4
    DIY Junior Member Lunker68's Avatar
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    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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