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Thread: Epoxy - What did I do wrong?

  1. #1
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    Epoxy - What did I do wrong?

    The other day I went to Lowes and brought some epoxy (Loctite 90 minute).

    It's supposed to dry in 90 minutes and 5 hours later whenever I touch the epoxy I leave a finger print, which leads me to believe that it's still not dry and itís never going to harden. From the picture below you can see that I did use more than enough...




  2. #2
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    epoxy is all about the mix...both ratio & how well mixed....either you didn't use enough "hardener" or you didn't mix it well enough...if the latter is the case then it will only be soft in some spots.....if you didn't add enough hardener then it may still set up overnight....unless you used way to little.......

  3. #3
    Raw Wave EsKALad's Avatar
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    U did mix them first right? Lol also 90 min is way too long I bought some stuff from autozone for plastics it set in 60 second and fully hard in 30 minutes. Was wonderful! One side was blue and the other was clear. Once u mix them u have 60 second to use it.

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    When I was pouring it, it didn't come out evenly. So that might be reason why its still soft. Should I wait or should I see if I can remove it before I create more work then needed? Though I already know I am in for a lot of work.


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    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    did you pour it onto something & mix it.......

  6. #6
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    Yes I mixed/spread it with one of those painter sticks. I'm very impatient and think I might need to let it sit over night.

    It felt pretty stiff so I pulled off the tape on the front side:


  7. #7
    FLAC evandude's Avatar
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    yeah 90 min epoxy can take some time to fully harden... the time limit refers to when it is SET (semi-hard, enough so it won't drip anymore) but it often takes 10, 20, 30, or more times that much time to fully cure. next time try 5 min epoxy or something similar. It may set too quick for you to pour a bunch of it for something that large, but there's no reason you can't do it in several stages and just mix up a few separate batches of epoxy. personally I never use anything but 5-minute epoxy since one time when we used the 2-ton epoxy (claims a few hours to set) and it was still not cured after a full day...
    But don't take it from me! here's a quote from a real, live newbie:
    Quote Originally Posted by Viscouse
    I am learning buttloads just by searching on this forum. I've learned 2 big things so far: 1-it's been done before, and 2-if it hasn't, there is a way to do it.
    eegeek.net

  8. #8
    Super Moderator. If my typing sucks it's probably because I'm driving.... turbocad6's Avatar
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    let it sit overnight.....it should harden enough to be usable.....if you can stick your fingernail in it & make a mark a few days from now you may have a problem.....but if you mixed it well even if your mix was off it should still harden enough.....

  9. #9
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    Thanks everybody, I sure hope yaíll are right about letting it sit overnight. Other than that I think it came out pretty good though. Itís really a perfect fit.

    I canít wait for the bondoing (Iím being sarcastic).

  10. #10
    Maximum Bitrate Altimat's Avatar
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    Heat will accelerate the cure. Fast epoxies are weak. I always let it set overnight.
    Fabricator

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