[NSRCA-discussion] AL welding with Durafix!!

[Fred Huber]

What I did... (wasn't on exhausts...)

Carefully clean one part and "tin" (give a light coat in the area to be joined)  it immediately with the Durafix
Carefully clean the other part and "tin"
Then heat and bring the parts together, adding a little more of the durafix rod.

The stuff is EXTREMEY sensitive to any oxidation of the material being joined.
If you clean the material with anything other than a stainless steel brush... you must reclean again with a stainless steel brush.  

Cleaning with a brass brush before the stainless.. forget it.  It will never join properly.
  ----- Original Message ----- 
  From: Ed White 
  To: NSRCA Mailing List 
  Sent: Friday, October 06, 2006 8:32 AM
  Subject: Re: [NSRCA-discussion] AL welding with Durafix!!


  I've had similar experience.  There's a knack to using it that I haven't picked up.  My joints are functional but ugly. Often there is some porosity.  I have used it on 4-stroke exhaust to repair pipes and repair a slimline Pitt's muffler on a YS140.  4-stroke exhaust temps are no problem.  

  One problem I have using it is getting and keeping the temperature right, too cold it doesn't flow (probably why I get porosity), not very much hotter and the aluminum gets soft.  One thing I haven't tried that might be helpful is to use one of those non-contact temperature guns.  It would have to go to 800 F or better.

  Ed

  Bob Richards <bob at toprudder.com> wrote:
    Fred,

    I've used it on a mousse can muffler on a two stroke and it is still holding up. Not sure about a four-stroke exhaust, which can get a lot hotter, but I suspect it would do ok.

    Bob R.

    Fred Huber <fhhuber at clearwire.net> wrote:
      The product has been around a LONG time.  first time I saw it was at an RV show/sale event appx 30 years ago.

      VERY careful cleaning of the metal to be joined is needed.  Stainless steel brush is mandatory.

      There's a bit of a trick to getting the stuff to work, but once you have it figured out it does a decent job on stuff that doesn't get hot.  I have not tried it on an exhaust.
        ----- Original Message ----- 
        From: Jim Woodward 
        To: 'NSRCA Mailing List' 
        Sent: Thursday, October 05, 2006 10:55 AM
        Subject: [NSRCA-discussion] AL welding with Durafix!!


        http://durafix.com/

        Hi Guys,

        Check out this link, then watch the usage video!  What a cool product!  Talk about an instant header fix.
        Jim W.



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