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Durafix Aluminum Welding Rods


I have no affiliation with this company, but this is GREAT STUFF for any home hobbyist!

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25 Responses to “Durafix Aluminum Welding Rods”

  • roaddiablo:
    May 12, 2010 at 9:57 pm

    @DaKnightFall So You have aluminum headers.

  • RatkoUSA:
    May 12, 2010 at 10:15 pm

    Crap think I posted twice, what’s with this new YouTube?

    BTW it would be incredibly difficult to weld aluminum as thin as the first example, I know I couldn’t do it. And that’s where these brazing techniques are absolutely necessary. Of course as he demonstrated they also work on thicker material, as well as in the joining of dissimilar metals, i.e. cooper to Al

  • RatkoUSA:
    May 12, 2010 at 10:15 pm

    I’ve used similar products and they can be useful, this is however not welding since 750 F is well below the approximate melting point of Al, and true welding involves the melting and fusing of the parent metals most often in conjunction with filler material. This process would be hard soldering aka brazing. It is strong, no doubt, but is metal brazing. OF welding Al, usually produces a bright sodium flare from the flux used.

  • RatkoUSA:
    May 12, 2010 at 10:53 pm

    I’ve used similar products and they can be useful, this is however not welding since 750 F is well below the approximate melting point of Al, and true welding involves the melting and fusing of the parent metals most often in conjunction with filler material. This process would be hard soldering aka brazing. It is strong, no doubt, but is metal brazing. OF welding Al, usually produces a bright sodium flare from the flux used.

  • j822bosh:
    May 12, 2010 at 11:04 pm

    Exactly, not many people realize the kinetics of raising Aluminum to 730 Fahrenheit with a torch flame. Only copper and silver are more conductive! Propane burns at 4000 F but it cannot even melt Copper (1981F melting point) unless copper and flame surrounded by refractory insulation(fire bricks).

  • Nounours821:
    May 12, 2010 at 11:55 pm

    @Bahamas4Joe No it won’t work. Magnesium alloys can be welded, it’s rather delicate but with training you can do it very well. Fluxes for magnesium alloys are pretty hard to find.

  • Nounours821:
    May 13, 2010 at 12:14 am

    @fre2fly You’ll find a lot of info about torch welding aluminum on Internet; in fact with the good fluxes aluminum welds and brazes very well. I do it every day until 1/2 inch thickness.

    During WWII hundreds of thousands of aluminum tanks for planes , and lot of other objects have been welded with torch (oxy acetylene or oxy hydrogen). It’s very well known and documented.

  • fre2fly:
    May 13, 2010 at 12:29 am

    but how does it work on aluminum? you cant solder or braze aluminum
    ive never been able to anyway

  • Bahamas4Joe:
    May 13, 2010 at 1:03 am

    Will it work on magnesium?

  • busajohnny:
    May 13, 2010 at 1:20 am

    Things I have found while using this amazing rod. If your welds are to close you will find when you make your second weld it can re-melt the first weld. When welding dissimilar metals keep them clamped until cool. Metals cool differently and in the cooling process the metals can break apart or the joint will be weakened by the contraction differences. You will have the best results when, prepare like your welding (keeping your joints really clean) and proceed like you brazing/soldering.

  • Nounours821:
    May 13, 2010 at 1:43 am

    It’s a Zinc-Aluminum-Copper alloy, not aluminum.
    IT’S NOT WELDING BUT BRAZING. A bit too hot for soldering and it’s not soft soldering…

    This brazing alloy has been used since a very long time.

    You’ll find a lot of different brands at very different prices per pound, so make your search…

    The zinc alloy is used also to braze pot metal and galvanized steel with the good flux.

    The Zinc brazing alloy works pretty well for repairing.

  • pigidly:
    May 13, 2010 at 2:15 am

    sold!!!!!!!!!!!!!!!

  • TESLAZPF:
    May 13, 2010 at 2:25 am

    THIS IS NOT WELDING….its soldering

  • backyardengineer:
    May 13, 2010 at 2:43 am

    In your video it doesn’t look like you need to abrade the surface to get under the oxide layer, does this provide as good a bond as Techno Weld?

  • gravey07:
    May 13, 2010 at 2:52 am

    doesnt spend long heating the surface, surely there isnt enough heat in there for good penetration. yea it might be hard to drill but how well does it hold two seperate parts together?? do the kits you recieve or buy actually work like the one we see here??

  • jamhamster:
    May 13, 2010 at 3:11 am

    It should work for the canoe, test in in an inconspicuous area first. I use it to fabricate/repair RC Car parts and it works really well, I made a 1:18th scale roll cage this weekend so it can do fairly intricate welds! – good luck ;-)

  • Hammandy:
    May 13, 2010 at 4:02 am

    Si alguien está interesado en probar una de estas varillas tengo algunas que me gustaría vender. Saludos.

  • mkerwin1:
    May 13, 2010 at 4:47 am

    I wanted to use this to repair my aluminum canoe that leaks. Has anyone tried this? How do you think it will hold up?

  • MuellerNick:
    May 13, 2010 at 5:36 am

    This is not welding by definition!
    Welding requires, that the work is molten.
    The process shown is *soldering*. With the temperature given, it is soft-soldering to be precise.

  • RestauranteChines:
    May 13, 2010 at 6:12 am

    Wow…that was surprising, it didnt even need a shielding gas and made a perfect adhesion. And all you need is a torch and welding rod. Can I really weld copper with this stuff? What does this aluminum differs from a normal alluminum?

  • afxgrin:
    May 13, 2010 at 6:33 am

    Wow awesome. That is seriously useful, thanks for the vid.

  • vwnut2:
    May 13, 2010 at 6:34 am

    The Map gas will work just fine. Make sure you have a decent tip for the torch. The cheapo tips do not produce a flame as hot as say for instance a TS4000 BernzOmatic. Propane should work as well with a decent tip.

  • vwnut2:
    May 13, 2010 at 7:02 am

    2 minutes of heating the material is way too long!! The guy that heated it for 25 minutes it out of his mind!! Not sure if youve ever soldered copper piping but if you heat the material too long the solder just rolls off the surface and does not adhere. More heat does not mean better adhesion. I have had great luck with these type rods. Heat just enough for the rod to melt then keep a flame on the work space at a slight distance. This stuff works as long as you do not overheat. Best of luck!!

  • tangnatalaga:
    May 13, 2010 at 7:08 am

    There is nothing wrong with these rods, they are amazing because of their low melting temperature. Keep in mind, aluminum have high heat conductivity. Meaning even tho the melting temperature is low, more heat is needed. Since aluminum have high electical conductivity, they are extremely hard for arc welding, which require preheating on thick materials. Also DC welding is a must. Mig welder have DC output, or a DC arc welder can be used on aluminum rods.

  • tangnatalaga:
    May 13, 2010 at 7:08 am

    You have to heat the aluminum to be welded at the right temperature using torch. It takes some practice. You can buy some aluminum rods coated with flux at a local welding supply, you don’t need that durafix stuff. Make sure you clean the parts to be welded really good, cuz oxide on the surface melts at much higher temp. With a little practice you can do it. Let me know if you got it good luck.

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