Fiberglassing a helmet

  1. #1
    frb13's Avatar
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    May 2007
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    so. cal
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    Fiberglassing a helmet

    I have a vac formed helmet. I was wondering if I can fiberglass the inside for strength? Will the plastic warp? What product would be best to use? Any info would help. Thanks

  2. #2

    Member Since
    Jan 2013
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    New Jersey
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    Re: Fiberglassing a helmet

    I dont see why you wouldnt be able to put glass inside for support. By adding this I would think it'd PREVENT it from warping. If you do this, you can pick up 3M All Purpose Fiberglass Resin and 3M Fiberglass Cloth from your local Lowe's (probably Home Depot or any other place like that too). Those are the resin/glass products I use. Hope this helps

  3. #3
    frb13's Avatar
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    Re: Fiberglassing a helmet

    Thanks. I have never worked with it before and just was unsure if the plastic would warp.

  4. #4

    Re: Fiberglassing a helmet

    frb13:
    If you too much hardener in the resin, it can warp. Work outdoors, I use rubber gloves and wear a breath mask. Strong odor. Also, the fiber glass cloth needs to be cut. If you use the mat, you can tear into pieces.

  5. #5
    syllander's Avatar
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    Sep 2013
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    Douglasville, Ga.
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    Re: Fiberglassing a helmet

    Fiberglass tends to "creep" after hardening, even a day or more later. Never done this but as stated above, don't use more hardener in the resin than it calls for. And keep it cool while curing, like tucked away on a table in the garage, till you can bring it inside(after most of the smell is gone).

  6. #6

    Member Since
    Apr 2006
    From
    Whitehorse, Yukon
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    Re: Fiberglassing a helmet

    Yeah. sand the inside of the helmet first, give it a good cleaning, and then fiberglass outside in the shade. The fiberglass resin sold by 3M, is pretty ****** though. Especially when it comes to measuring out the catalyst. I think it calls for 12drops of catalyst to every 30ml of resin. But the tube the catalyst comes in, doesn't have a hole, so your drops aren't going to be consistent with their measurements anyways. Go to a decent marine supply store and get some polyester resin with wax. The wax additive, creates a barrier that seals the air out and helps the resin to cure. You won't need to go crazy glassing it. You can shred up some fiberglass mat, but it's important to make as even of a layer as possible. The thicker areas will get much hotter than the thinner, and could cause warping.

  7. #7
    frb13's Avatar
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    so. cal
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    Re: Fiberglassing a helmet

    Thanks that helps a lot!

  8. #8

    Re: Fiberglassing a helmet

    65D Smooth on to rotate it around? Did you cut out the visor hole yet?

  9. #9
    frb13's Avatar
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    May 2007
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    so. cal
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    Re: Fiberglassing a helmet

    Ok another ? Can I use the resin without the fiberglass? Or should I use the fiberglass cloth also. Thanks

  10. #10

    Re: Fiberglassing a helmet

    it is very brittle w/o the actual fiber glass

  11. #11
    High Speed Low Drag Fett 4 Real's Avatar
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    Jan 2010
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    USAF Utah
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    Re: Fiberglassing a helmet

    Try and watch alot of youtube videos before attempting this....

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