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Wet Systems 105/205 Epoxy Not Curing

Discussion in 'Steel, Hardware, & Handle Material' started by Newfiebackflip, Jul 4, 2016.

  1. Newfiebackflip

    Newfiebackflip New Member

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    Anyone have any issues with Wet Systems 105/205 Epoxy not curing?

    I was making a batch of micarta and used the pump system and mixed the ratio as per the instructions and it's been 4 days and it's still tacky. First 2 days I figured it was because my shop at work was cold. But I've put it in the direct sun light yesterday and doing the same today and it still doesn't want to harden.
     
  2. Roman

    Roman Active Member

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    I think you might have mixed it wrong... Epoxy would cure even if it's a few years out of date.
    What I would try is to put it in oven at 60-70 C for a few hours, if it doesn't cure - you are out of luck and need to re-do everything...
     
  3. Newfiebackflip

    Newfiebackflip New Member

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    Really am not trying to be a smart ass because you guys have a ton of experience in this. But I did everything as per the instructions so I don't know how it would be mixed wrong. I have a heat gun I might take to it to see if I can get the reaction going a bit. Not really comfortable putting that in an oven.

    If that doesn't work I will scrap it and either start all over or just buy g10.
     
  4. Roman

    Roman Active Member

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    sousaphone happens and you could have mix it wrong somehow. Or epoxy might be bad.
    I would be careful with the heat gun. Epoxy starts to disintegrate at about 90 C, so you might get it worse. Try to warm it up some other way besides direct sunlight. I don't know for sure but I would not be surprised if UV radiation affects curing epoxy bad way.

    To check if epoxy is ok I would mix a small volume like 5 grams measuring components really carefully and let it harden. I always pour resin in a measuring cup and then add hardener directly to resin. If you measure hardener in different container, you would need to make sure you take it all off the walls of that container which is not easy...

    Good luck with that.
     
  5. Newfiebackflip

    Newfiebackflip New Member

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    The cups I mixed it in were rock hard. Ended up chucking it. I got lucky and got that epoxy and fabric for free so it's not a total waste of my funds; just a waste of time.
     
  6. Roman

    Roman Active Member

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    Interesting... Then it's not mixing error. It must be something within that fabric what prevents it from curing.
    Try to warm it to 60-70 C for a few hours (no heat gun or direct sunlight though). If that doesn't help - I would not use this fabric again.
     
  7. Newfiebackflip

    Newfiebackflip New Member

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    I'm thinking it is the fabric. Was not sticking together at all once I separated the press.

    I'll just go for g10 if I can find someone who has what I want in stock or with my backup plan of using Douglas fir end grain.
     
  8. John Noon

    John Noon Well-Known Member

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    Epoxy has two normal issues that can cause problems.

    Humidity over 90%
    Over one year old
    Had some old stuff that took two weeks for the mold to cure enough to be pulled apart.

    Watch for any fabric that has a waterproof or water resistant coating, some of this stuff is like Teflon for resisting a bond.
     
  9. Slannesh

    Slannesh Active Member

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    I've got some old West systems 105/207 that I got from a guy at work here that takes a lot longer to cure than the new stuff I bought. Several days to cure all the way through instead of rock hard overnight like the new stuff.

    Though since the stuff in your pot cured normally I would suspect the fabric had something to do with it.
     
  10. Grizz Axxemann

    Grizz Axxemann Active Member

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    I'm leaning towards bad fabric. Was it oily or greasy at all? What kind of material? I did a test the other day with some 1000d Cordura that I had left over from getting my motorcycle jacket altered and it started to melt when it hit the epoxy I intended to use. So I went to canvas instead. Those test pieces turned out, so now I just have to make a proper clamping jig to get some handle stock.
     

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