Epoxy

Discussion in 'Wooden Boat Building and Restoration' started by dskira, Jul 10, 2010.

  1. dskira

    dskira Previous Member

    I am not a specialist in epoxy and I seldom use it. I use as epoxy only the coal tar epoxy.
    My question is: what is the difference between a marine epoxy and a general industrial epoxy?
    The coal tar epoxy I use has a mixture of 1 to 1, very practical and last for ever and remain a great deal flexible.
    Why every epoxy manufacurer has different ratio?
    As a glue I find the industial urthane PL Premier far superior than the West epoxy for the tenth of the price.
    And that lead me to that question: why epoxy is so expensive, been in the market for, I think, 50 years? West or Three was not born :)
    I left out the "System" :p
    Daniel
    PS. I forget to mention that I am not talking about stich and glue nor cold molded. (which I did with Aerodux)
    I was asking this question for classic construction with frames (laminates) hard chine hull, strip planking, well the normal wooden boat construction.
     
  2. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    Hi, Daniel.

    I read a couple of sites that coal tar epoxy was being banned. Do you know anything about that? How will that effect you?
     
  3. gonzo
    Joined: Aug 2002
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    Location: Milwaukee, WI

    gonzo Senior Member

    The Geugon brothers started WEST to formulate an epoxy that could be used in normal boatyard conditions. There are many epoxies now that will cure are different tempratures and hugh humidity. Low viscosity is very important for laminating but not for gluing if you are using a load.
     
  4. dskira

    dskira Previous Member

    Not at all, it is not banned.
    Some group would like to and make noise, but the reality is: without it all the pipes underground can't be protected. Several million gallons every years are use for different application. The boat application is relatively modest.
    You can find it of the shelf easily. It is expensive.
    The Great Principe of the Green is the following: When the smell is what they consider bad, it should be banned.:p
    They try with pine tar in EU and they succeed to ban it, until the real specialist community told it was a lie, and they reinstated it.
    Becarefull with Green, they are like a cult. Noisy and never tell the whole truth. And they know how to use the internet.
    they would like us to use only water based product, while they use in their own home good and durable oil base paint.
    As you can see I am not happy about these peoples.
    Daniel
     
  5. dskira

    dskira Previous Member

    Good point about the gluing.
    In the late 60' I was using Araldite, and it was very fine in anny condition.
    The packaging was ugly, and you hade to buy by 25Kg.
    Then I built some tortured plywood Tornado's using the Araldite.
    Lets face it West and other "System" which came after Ciba invented and marketed the Araldite, just packaged differently.
    Araldite was fine in any condition, used in top of the Alps in winter, and in southern France in Summer. The rest is pure marketing.
    I let go the epoxy and almost never use it, finding it out of price for little practical use, in my own way to built boat. Beside my dear coal tar epoxy of course :p
     
  6. dskira

    dskira Previous Member

    You look good! Nice to see you.
    Are you on the Americo Vespucci or the US Coast Guard square rigged bark Eagle?

    Daniel

    [​IMG]
     
  7. dskira

    dskira Previous Member

    Or on the tall ship Gloria

    [​IMG]
     
  8. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    No truer words were ever spoken.

    Daniel, you have painted these people very accurately.:)
     
  9. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    I was on board both the Eagle and the Gloria yesterday.:D

    Both sets of crews and students(cadets) were fine outstanding people.
     
  10. celenoglu
    Joined: Dec 2009
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    celenoglu Junior Member

    Generally epoxies treated with some type of UV proteton are called marine epoxies. Although they have sme UV protection it shouldnot be used as a top cover. Therefore if there is a price difference between epoxy and marine epoxy, you can use the normal one. You are anyhow going to to paint over.
     
  11. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    A.R.C. Gloria

    Ring on!
     

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  12. hoytedow
    Joined: Sep 2009
    Posts: 5,402
    Likes: 193, Points: 73, Legacy Rep: 2489
    Location: North of Cuba

    hoytedow Wood Butcher

    Let Freedom Ring!
     

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  13. dskira

    dskira Previous Member

    Sorry about that

    I find the post:
    And it has good infos.
    I should have gone thru the threads before posting.
    but if I did that, I will never have seen the picture of our friend Hoyt :)
    So, on a second thought, I am not sorry at all.
    Daniel
     
  14. hoytedow
    Joined: Sep 2009
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    Location: North of Cuba

    hoytedow Wood Butcher

    When do you estimate you will float your houseboat, Daniel? :)
     

  15. gonzo
    Joined: Aug 2002
    Posts: 13,342
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    Location: Milwaukee, WI

    gonzo Senior Member

    Tar epoxy is banned in Europe.
     
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