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Thread: Penetrating oils comparison

  1. #1
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    Penetrating oils comparison

    This came up on my Hovercraft forum, - thought it interesting, especially the homebrew...

    In fairness, WD-40 is not designed as a penetrator/rust release agent, it just gets used for 'everything'.


    Machinist's Workshop Mag recently published some information on various penetrating oils that I found very interesting. Some of you might appreciate this. The magazine reports they tested penetrates for break out torque on rusted nuts.
    - They arranged a subjective test of all the popular penetrates with the control being the torque required to remove the nut from a "scientifically rusted" environment. Penetrating oils Average torque load to loosen

    * No Oil used 516 pounds
    * WD-40 238 pounds
    * PB Blaster 214 pounds
    * Liquid Wrench 127 pounds
    * Kano Kroil 106 pounds
    * ATF-Acetone mix 53 pounds

    *** ATF=Automatic Transmission Fluid

    The ATF-Acetone mix is a "home brew" mix of 50 - 50 automatic transmission fluid and acetone. Note this "home brew" released bolts better than any commercial product in this one particular test.

    Steve from Godwin-Singer says that ATF-Acetone mix is best, but you can also use ATF and lacquer thinner in a 50-50 mix, (this actually works well). Power-steering fluid also works as well as ATF!

  2. #2
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    I would like to see how Inox compared to WD40, CRC etc. I feel it is better, but have no proof

  3. #3
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    It's been doing the rounds, and has been here before. I sent the ATF/acetone recipe over to my neighbour who restores old australian diesel tractors. He used the brew to remove a piston frozen in a Mc Donald superdiesel block. he said the results were amazing as he'd been soaking it in diesel and whatever else he had for months, but the application of the new brew brought it undone quite quickly after it was applied.

  4. #4
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    Question

    How does the ATF/Acetone Mix affect paintwork, if it sits for a while?
    Cheers, Pickles.

  5. #5
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    Quote Originally Posted by Pickles2 View Post
    How does the ATF/Acetone Mix affect paintwork, if it sits for a while?
    Cheers, Pickles.
    what paintwork
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  6. #6
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    Eucalyptus oil also works very well, but is rather expensive

  7. #7
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    What about Penetrene? I use it a lot at work (Aluminium smelter) and it is good at releasing all types of fixtures. Needs time to soak though.
    Interesting, who would have thought Acetone and ATF.????
    Regards
    Robbo.

  8. #8
    d@rk51d3 Guest
    Quote Originally Posted by robbotd5 View Post
    Interesting, who would have thought Acetone and ATF.????
    Regards
    Robbo.
    With the addition of equal parts of Mineral turps and Kero, it is also a military grade gun cleaner, known as Ed's Red. (some also add a touch of lanolin)

    Used some on a handfull of gunked up nuts and bolts. After a quick swish around the tin, they came out looking like new. Once the acetone evaporates, the residual oils lubricate and protect.

  9. #9
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    Thumbs up Bolt-Off

    The best commercially available penetrant I have experienced ( NQ only it appears) is a product called Bolt-Off, made in Mackay.
    Unfortunately, unable to find it in sunny Victoria.

    I came across this product when I worked in the Cairns region. It was by far better than any other penetrant available.

  10. #10
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    Homestar is offline Super Moderator & CA manager Subscriber
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    X2 for Penetrene. It is a thin red coloured stuff - wonder what the ingredients are...

    Will be trying the home brew mix as well - nice and easy and cheap.
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.

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