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Thread: Teach me how to fiberglass

  1. #1

    Default Teach me how to fiberglass

    Bought a little stuff to play around with. I'm starting out out with a 1' x 2' of 3/8" Core-Cell as learning piece. I've got two layers on with polyester resin and 6 oz. cloth. I've got some polyester resin with wax for a finish coat. Do I need to put any of that on before I gelcoat? Any suggestions are welcome as I've never done any fiberglass work at all. How much do I build up with resin and glass cloth, resin only, how many coats of gelcoat? How do I handle the edges? Should I have wet down the corecell before I applied the cloth? It seemed to wet out ok. I'm hoping to graduate up to a hardtop someday. Thanks Kirk

  2. #2
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    Fiberlay has some good info on their site. You need to read up on the types of resins and what to add when. Each person doing glass work may do different things that may work. It is best to use a wet out board. You can PM me with your ph number if you want to talk.
    Good luck

  3. #3

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    Thanks MGH Fiberlay had a lot of good info.

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    Moderator kingfisherktn's Avatar
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    Quote Originally Posted by kbarnes View Post
    Thanks MGH Fiberlay had a lot of good info.
    Ken: me thinks you have an ambitious goal ahead of you.

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    I think so too, we need to find someone in Ketchikan to do it for me. LOL

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    Moderator kingfisherktn's Avatar
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    Quote Originally Posted by kbarnes View Post
    I think so too, we need to find someone in Ketchikan to do it for me. LOL
    I found out that the one fiberglasser anyone would recommend died a couple of years ago.

  7. #7

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    That's too bad, maybe we can get potbuilder to move down, his fiberglass work looks awfully good and he could teach me how to catch shrimp at the same time.

  8. #8

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    Quote Originally Posted by kingfisherktn View Post
    I found out that the one fiberglasser anyone would recommend died a couple of years ago.
    Maybe unrelated...maybe not.
    First Lesson in Fiberglassing 101:
    Always use adequate Personal Protection Equipment!
    "96% of all Internet Quotes are suspect and the remaining 4% are fiction."
    ~~Abraham Lincoln~~

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    Sponsor potbuilder's Avatar
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    Quote Originally Posted by Akres View Post
    Maybe unrelated...maybe not.
    First Lesson in Fiberglassing 101:
    Always use adequate Personal Protection Equipment!
    #2 have large bucket(s) of acetone at hand !!

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    Quote Originally Posted by kbarnes View Post
    That's too bad, maybe we can get potbuilder to move down, his fiberglass work looks awfully good and he could teach me how to catch shrimp at the same time.
    Itchy & Scratchy Boatworks at your service.

    If you want something to practice on just get some of the yellow roofing insulation/foam. It shapes nice with sandpaper and the resin won't melt it. I've made large(4x4x8) deck/fish boxes with it and used it for bulkheads in the fish hold of my bowpicker. You could use it for that top your thinking about. 4'x8'x 1-1/2" was 20 bucks in anchorage.

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    I think this might be what your looking for. Its a top for a lobstah boat. They were glassing 2 sections together.
    top1.jpgtop2.jpg

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  12. #12

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    Quote Originally Posted by potbuilder View Post
    Itchy & Scratchy Boatworks at your service.

    If you want something to practice on just get some of the yellow roofing insulation/foam. It shapes nice with sandpaper and the resin won't melt it. I've made large(4x4x8) deck/fish boxes with it and used it for bulkheads in the fish hold of my bowpicker. You could use it for that top your thinking about. 4'x8'x 1-1/2" was 20 bucks in anchorage.
    Is that the same or similar to the Dow Corning rigid pink stuff?

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    Quote Originally Posted by Garyak View Post
    Is that the same or similar to the Dow Corning rigid pink stuff?
    I'm pretty sure the pink stuff will melt.

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    Pink dow is extruded polystyrene (styrofoam) - I'm pretty sure that will have a tough time with epoxy or resin. You might be after a polyurethane product for glassing, but I'm not sure.

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    yellow foam used for insulating roofs with brown paper on both sides.

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  16. #16

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    The pink, blue and white all melt. The yellow stuff Steve is talking about is made by Atlas Roofing among others.

  17. #17

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    Odd that I'd never noticed it before...I'll look for it next time I'm out and about.

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    Quote Originally Posted by Garyak View Post
    Odd that I'd never noticed it before...I'll look for it next time I'm out and about.
    the big box stores don't have it either does SBS.

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    Quote Originally Posted by potbuilder View Post
    yellow foam used for insulating roofs with brown paper on both sides.
    That is a polyisocyanurate, celotex makes rigid foam and or dow has some they call R-MAX http://www.rmax.com/, SBS or Uresco would have some, comes in a variety of thicknesses, the roof insulation has the paper backers, other wise it typically has a foil surface on one or both sides.
    “Nothing worth doing is easy”
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    any polyurethane foam will work with Polyester resin. Any Poly styrene foam will not. You can however, glass over poly styrene foam with epoxy. I was in the composites business for thirty years. wear a respirator, styrene causes leukemia...don't ask me how I know that.

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