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Concrete Additives affecting PEX

Tim Doran_4Tim Doran_4 Posts: 138Member
Most of the normal latex modifiers and calcium based additives are ok. Anything with an alcohol/solvent base or with low molecular weight organics could be an issue. Check with the manufacturer to be certain.

Tim D.

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Comments

  • Glenn Sossin_2Glenn Sossin_2 Posts: 592Member
    Concrete Additives affecting PEX

    I just received a phone call from a concrete guy - asking me about concrete additives other than calcium chloride to promote drying of the concrete. He is asking me what additives can be used that are not harmful to the pex. I've never come across this question before. Anyone got any info?
    Thanks
    Glenn
  • John Starcher_4John Starcher_4 Posts: 794Member
    I don't, but....

    ....that would be an excellent question to pose to the manufacturer of the pex tubing!!!!!
  • hot rod_7hot rod_7 Posts: 9,033Member
    find out what products

    he is considering, then get the data sheet from an online sourse or the manufacture.

    There are many different concrete additives available for concrete. You need to know which specfic type and brand to get an OK from the pex manufacturer.

    hr
    Bob "hot rod" Rohr
    trainer for Caleffi NA
    The magic is in hydronics, and hydronics is in me
  • WeezboWeezbo Posts: 6,232Member
    on a similar note...

    not all Sealers are created equal....you might want to check on what he is using in the expansion joins and the sealer...

    the larger the pour the more likely some differences will arise with where the pex actually comes to live within the slab..

    the saw depth may be set a shade deeper the mesh might get Pulled higher and without your x ray glasses it is difficult to determine just how close to these chemicals the pex may be...veer to the side of caution , my thinking...
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