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  1. frb13's Avatar
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    Mar 21, 2014, 7:28 PM - Fiberglassing a helmet #1

    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. Member Since
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    Mar 21, 2014, 11:20 PM - Re: Fiberglassing a helmet #2

    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. frb13's Avatar
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    Mar 22, 2014, 12:05 PM - Re: Fiberglassing a helmet #3

    Thanks. I have never worked with it before and just was unsure if the plastic would warp.
  4. SPY007's Avatar
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    Mar 22, 2014, 10:54 PM - Re: Fiberglassing a helmet #4

    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. syllander's Avatar
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    Mar 23, 2014, 12:13 AM - Re: Fiberglassing a helmet #5

    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. Member Since
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    Mar 23, 2014, 1:41 AM - Re: Fiberglassing a helmet #6

    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. frb13's Avatar
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    Mar 23, 2014, 10:37 AM - Re: Fiberglassing a helmet #7

    Thanks that helps a lot!
  8. NoGoodToM3D3ad's Avatar
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    Mar 31, 2014, 8:12 PM - Re: Fiberglassing a helmet #8

    65D Smooth on to rotate it around? Did you cut out the visor hole yet?
  9. frb13's Avatar
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    Apr 29, 2014, 6:15 PM - Re: Fiberglassing a helmet #9

    Ok another ? Can I use the resin without the fiberglass? Or should I use the fiberglass cloth also. Thanks
  10. SPY007's Avatar
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    Apr 29, 2014, 10:10 PM - Re: Fiberglassing a helmet #10

    it is very brittle w/o the actual fiber glass
  11. High Speed Low Drag Fett 4 Real's Avatar
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    Apr 29, 2014, 11:00 PM - Re: Fiberglassing a helmet #11

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

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