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High temperature epoxy (JB Weld 15 hr cure)


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  1. #1
    Join Date
    26th July 2009
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    Fishers, Indiana
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    696

    High temperature epoxy (JB Weld 15 hr cure)

    This stuff is to be used to install Rocketarium's new 24mm motor retainers. I've never used the stuff. Is it common in hardware stores, can I buy in online? Thanks for your help.
    AMOREA - "A Method Of Reaching Extreme Altitudes," Robert Goddard. NAR #540

  2. #2
    Join Date
    18th January 2009
    Location
    Central Florida launch sites
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    717
    I buy mine at AutoZone. You can get the 'Industro' size
    (5 oz. each tube) for about $10.

    I've seen the smaller tubes (1 or 2 oz.) at Home Depot
    and Lowes. But watch out for the Kwik, it isn't rated
    for the higher temps.
    -- brian
    NAR 83726 \ TRA 11640 \ L2

  3. #3
    Join Date
    26th July 2009
    Location
    Fishers, Indiana
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    696
    Is this the stuff?
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    AMOREA - "A Method Of Reaching Extreme Altitudes," Robert Goddard. NAR #540

  4. #4
    Join Date
    18th January 2009
    Location
    Central Florida launch sites
    Posts
    717
    Quote Originally Posted by Marlin523 View Post
    Is this the stuff?
    That's what you DON'T want.

    From the JB Weld website-
    Quote:
    Q: What is the tensile strength of J-B Weld and J-B Kwik?
    A: J-B Weld has a tensile strength of 3,960 psi. J-B Kwik has a tensile strength of 2,424 psi.

    Q: What is the difference between J-B Weld and J-B Kwik?
    A: The simple answer is that J-B Kwik is about half as strong as J-B Weld in both strength and heat resistance.
    J-B Weld Properties (psi)
    Tensile Strength: 3960
    Adhesion: 1800
    Flex Strength: 7320
    Tensile Lap Shear: 1040
    Shrinkage: 0.0%
    Resistant to: 500 F

    J-B Kwik Properties (psi)
    Tensile Strength: 2100
    Adhesion: 1800
    Flex Strength: 7320
    Tensile Lap Shear: 1040
    Shrinkage: 0.0%
    Resistant to: 300 F
    Commercial motors are allowed (per NFPA) to 200 degrees Celsius
    (or 392 F), so I never use JB Kwik on motor mounts or retainers; only
    the regular stuff. Of course, with just 24mm motors you'll probably
    be OK with the Kwik if you have it on hand.

    This is the packaging (along with the Kwik) you'll find at most
    hardware stores-

    And this is the Industro package I get at AutoZone-



    HTH!
    Last edited by brianc; 5th July 2010 at 09:50 PM.
    -- brian
    NAR 83726 \ TRA 11640 \ L2

  5. #5
    Join Date
    26th July 2009
    Location
    Fishers, Indiana
    Posts
    696
    Thanks BrianC
    AMOREA - "A Method Of Reaching Extreme Altitudes," Robert Goddard. NAR #540

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