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Need a epoxy recommendation

Discussion in 'Miscellaneous' started by Bastiuscha, Feb 1, 2021.

  1. Bastiuscha

    Bastiuscha Active Member Gold Contributor

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    Hey Friends, i had an accident with my Actuators.... the Epoxy is broken. I have linear Actuators and on the upper Part, i glued my threaded rods (in a petg sleeve) with this Clue.

    But sadly the glue does not seem to hold PETG and Carbon together. So i ask you for the mega Epoxy...can you guys recommend something for me?

    Edit: somehow the link don't work. I used JB-Weld epoxy.
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    Ads Master

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  3. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    i use some pretty hard to find shit.. its 3m scotchweld np460 because at the time it was suitable for carbon fibre but it is also good for heaps of shit like low temp and all that.. dont think you can get it anymore they have probably superseeded it with something else.. but the main issue is with scotchweld is they expect you to use a proprietry gun to squeeze the tube and a nozzle that self mixes and then comes out like a silicon gun premixed (which is cool) but the gun is like 150 usd.. you can get copies on ebay though for 1/3 of the price.. anyway.. only had 1 issue with it but that was because i didnt clean the carbon fibre resin off enough so when it let loose i had heaps of the dust on the part to show me this.. all else is tough as nails!

    This is the applicator in question.... https://embossingtapesupplies.com.au/scotch-weld-epx-plus-ii-applicator.html

    then you need self mixing nozzles... https://www.3m.com/3M/en_US/company...X-Mixing-Nozzles/?N=5002385+3293121625&rt=rud
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  4. Dirty

    Dirty Well-Known Member Gold Contributor

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    PET (and thereby also PETG) is notoriously hard to glue properly by mere mortals.

    There are some substances that are able to dissolve PETG and create a reliable glue connection, but I heard those are not available for purchase over the counter unless you are a trained professional working in the industry.

    I have made some OK connections by roughing up the surface and then using ordinary 5 min epoxy, but I would not use those for anything that carries load. It gets worse with frequent load changes. It is only a matter of time until the epoxy will wiggle itself free from the PETG.

    If you can, I would melt threaded inserts into the PETG part and then use a screwed connection.

    If you come across something that holds, that would be great! Let me know how it goes.
    Last edited: Mar 4, 2021
  5. Bastiuscha

    Bastiuscha Active Member Gold Contributor

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  6. Peacemaker105

    Peacemaker105 Active Member Gold Contributor

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    haha thats great you found some scotchweld that doesnt require the applicator man!! good job :) 3m is really the pinnacle in all this stuff, to be honest lol.
  7. Dirty

    Dirty Well-Known Member Gold Contributor

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    I will also give this a try. It would allow for some elegant design simplifications if those glued connections would hold up well.
    Thanks!
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  8. Bastiuscha

    Bastiuscha Active Member Gold Contributor

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    Yes try it and give me please a Feedback! I would be very interested. I think with me, all Problems are solved with this Glue.
  9. Bastiuscha

    Bastiuscha Active Member Gold Contributor

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    Update....i did an mistake and broke my carbonrod and my 3d printed Part....but the Glue still holds perfect. Now i can say.....USE this very nice glue. :)