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  1. #1
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    Default Elmers Fiberglass Resin

    I seen a can of Elmers Fiberglass Resin in a store today. It is the same logo as you see on Elmers glue. Has anyone here ever tried this or can you guys give some information on it?
    Thanks!

  2. #2
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    Default Re: Elmers Fiberglass Resin

    Generic polyester resin with an Elmer's label slapped on the can. It is unwaxed, so you will need to do one of three things for it to cure properly:

    1. Vacuum bag.

    2. Seal the part in plastic.

    3. Add surfacing wax to the mix during the final layer of laminate (easiest).

    You will not find surfacing wax at a box store. You will need to either source it through a composites shop or online.

  3. #3
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    Default Re: Elmers Fiberglass Resin

    There is no need to do anything to seal the surface, most of the time wax is pretty much a waste of time and money with resin.

  4. #4
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    Default Re: Elmers Fiberglass Resin

    Non-waxed polyester resin will not typically fully cure in the presence of air at normal temperatures. The finished surface will be tacky and difficult to sand/fair.

    The need for wax depends on the application of the product.

  5. #5
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    Default Re: Elmers Fiberglass Resin

    The surface will stay tacky for short period of time, but this will go away soon.

    If you plan to sand and fair it, it isn't all that common to use a fine paper, you normally start with something coarse enough that clogging the paper isn't much of an issue.

    Waxed resin is rarely used for anything and covering it with something to have the surface cure tack free is done even less often.

  6. #6
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by ondarvr View Post
    The surface will stay tacky for short period of time, but this will go away soon.

    If you plan to sand and fair it, it isn't all that common to use a fine paper, you normally start with something coarse enough that clogging the paper isn't much of an issue.

    Waxed resin is rarely used for anything and covering it with something to have the surface cure tack free is done even less often.
    Polyester laminating resin (unwaxed) and polyester finishing resing (waxed) are two different things with different purposes and reasons for use. I'm not trying to argue, just educate.

  7. #7
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by Shife View Post
    Polyester laminating resin (unwaxed) and polyester finishing resing (waxed) are two different things with different purposes and reasons for use. I'm not trying to argue, just educate.


    ondarvr's knows what he is saying and says what is practical and works. i tend to take heed to what the man writes as it is spot on truth and educated enough.

    RC

  8. #8
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    Default Re: Elmers Fiberglass Resin

    This is surprising. I was expecting to hear that this product would not work. So this would be OK to use for small repairs? I have read on this forum that other resins such as bondo or other department store type resins would absorb water. Thanks for the input!

  9. #9
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    Default Re: Elmers Fiberglass Resin

    All resins will sort of absorb water, even epoxy.

    There are only a few companies that make resin, small companies and ones that only sell small amounts of resin buy it from the these manufacturers and slap their label on it. So what comes in the Elmers can is most likely used to make boats in some plant also.

    The problem is that some of these resins may have a very fast gel time, or may be the "no drip" (just very thick) type, both of these can be hard to use in some applications.

  10. #10
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by 86RajunCajun View Post
    ondarvr's knows what he is saying and says what is practical and works. i tend to take heed to what the man writes as it is spot on truth and educated enough.

    RC
    I'm sure that ondarvr is very knowledgeable. However, I'm not a fan of broad generic advice.

  11. #11
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    Default Re: Elmers Fiberglass Resin

    Any of the generic labled resins I've seen at box stors have been waxed.
    I saw the Elmers but haven't tried it.

    I had one gal of waxed that I was mixing with unwaxed resin just to get rid of it, darn if there wasn't enough wax in that one gal to convert a case of unwaxed. I got it from home depot. Its kinda thick too.

  12. #12
    Petty Officer 1st Class tdrudd87's Avatar
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    Default Re: Elmers Fiberglass Resin

    In my experience, the box store resins are harder to work with and less predictable then a good quality resin from a specialty supplier. I bought the poly resin for my boat a real fiberglass shop and the difference is night and day with both flow and working time.
    My Resto Thread: http://forums.iboats.com/showthread....34#post2311534

    Experience- what you got when you didn't get what you wanted.

  13. #13
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    Default Re: Elmers Fiberglass Resin

    Many of the resins I have seen in stores are not marked "finishing or laminated" or "waxed and unwaxed". How do you know what you are getting. I have also noticed this same problem with markings on websites.

  14. #14
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by Chuck Gibson View Post
    Many of the resins I have seen in stores are not marked "finishing or laminated" or "waxed and unwaxed". How do you know what you are getting. I have also noticed this same problem with markings on websites.
    Without tracking down a data sheet for the product you will have a hard time getting a straight answer.

    US Composites sells only unwaxed resin. They also sell fresh MEKP and surfacing wax at very reasonable prices.

  15. #15
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    Default Re: Elmers Fiberglass Resin

    Everyone has their own opinion on waxed vs. unwaxed. I use unwaxed laminating resin, and add surfacing agent as necessary if I know that I want to get right into sanding it. Just out of curiosity, what type of small repair are you using it for? That might make a bit of difference, because as ondarvr mentioned, these resins are sometimes designed to perform in different ways. You can adjust shrink, flex, thixotropy etc.
    Here is an article titled, "Elmers fiberglass resin sucks." Could be worth a read, but I don't have any experience with it one way or another.

  16. #16
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by Chuck Gibson View Post
    This is surprising. I was expecting to hear that this product would not work. So this would be OK to use for small repairs? I have read on this forum that other resins such as bondo or other department store type resins would absorb water. Thanks for the input!
    Yes Chuck it will work for small repairs ....... most absorb water but we have ways to fix that. Whatever you do... do not use automotive body filler
    This is a great link to boat specifications http://boatspecs.iboats.com/
    Please, shop iboats first!!


  17. #17
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by SBTOM View Post
    Just out of curiosity, what type of small repair are you using it for?
    I have got a few small repairs to make on a sailboat but I am learning/practicing to replace the stringers and transom in a 16' tri-hull. I will start a new thread on that titled something like "repair gelcoat before painting?" Please help me when it is posted, I am trying to stay on topic. I was hoping I could find a local supplier of fiberglass resin but here around Dallas TX it don't look like it is going to happen.

  18. #18
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by Bob_VT View Post
    Yes Chuck it will work for small repairs ....... most absorb water but we have ways to fix that.
    How do you fix that?

  19. #19
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    Default Re: Elmers Fiberglass Resin

    You shouldn't have a problem finding fiberglass supplies in the Dallas area, just keep checking.

    Try something like this, it was just the first of many that popped up.

    http://www.superpages.com/bp/Denton-...92.21619757597

  20. #20
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by Chuck Gibson View Post
    How do you fix that?
    Don't worry about, its not a concern unless the boat will be moored in the water all the time and the patch is below the water line.

  21. #21
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    Default Re: Elmers Fiberglass Resin

    Quote Originally Posted by Shife View Post
    I'm sure that ondarvr is very knowledgeable. However, I'm not a fan of broad generic advice.


    I try to not get too specific when its not needed, adding details like bagging a laminate to seal the surface makes it sound important and complicated, which only creates more doubt in the owners ability to do a simple DIY job.

    I stick with the basics, use the correct amount of catalyst, mix well, grind the surface well before glassing... things like that. If later they need more info on a specific method or process, then it can be supplied at that time.

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