[NSRCA-discussion] AL welding with Durafix!!

Wed Oct 11 06:15:55 AKDT 2006

Guys,

Received my Durafix yesterday.  The rods come in a re-sealable tube and have
a small wire cleaning brush included.  I couldn't resist giving this a shot
so I did the following tests:

1.	Took a left over section of AL stab tube, brushed it well with the
included wire brush, put it in a vice, and heated the Al tube with my torch
(Butane?? - typical blue bottle torch).  Remembering the video off the
website, I heated up the AL tub section for less than a minute and then
started rubbing the Duraflux rod over the surface of the AL tube section.
After a few passes the rod began melting and "flowing" like in the video.
Seemed to work OK.
2.	Next I took a Bud Light AL-bottle/can and held it in the vice.  I
made NO attempt to clean the bottle lip with the brush.  I then used the
same torch to heat up the bottle/can, made some passes with the rod, and
again, the rod flowed nicely onto the bottle lip section.  
3.	After cool down I took some large pliars and tried to peal off the
newly added sections of Durafix.  I could not get the Durafix to peal-off
either welds.

Seems easy enough to apply on these materials.

Jim W.

From: nsrca-discussion-bounces at lists.nsrca.org
[mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of Fred Huber
Sent: Friday, October 06, 2006 11:20 AM
To: NSRCA Mailing List
Subject: Re: [NSRCA-discussion] AL welding with Durafix!!

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 <mailto:edvwhite at sbcglobal.net>  

To: NSRCA Mailing List <mailto:nsrca-discussion at lists.nsrca.org>  

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 <mailto:jim.woodward at schroth.com>  Woodward 

To: 'NSRCA Mailing List' <mailto:nsrca-discussion at lists.nsrca.org>  

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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