leak-stop compound

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    • #272434
      Avatar photoMasterPlumbers

        I am looking for a leak-stop compount I can use in a hydronic heating system to stop some pin-hole leaks in
        some antique cast iron radiators. Diassambling them is not an option as they weigh 600-800 Lbs. and are in an awkward
        spot. An older ex-plumber friend mentioned a “silver-powder” he used to use, but he couldn’t remember a name.


      • #285738
        Avatar photohj

          Probably Alum-a-seal available in auto supply stores.

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