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Thread: Seam Sealing

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  1. #1
    Brian Miller's Avatar
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    Sep 2011
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    Seam Sealing

    The NX-x50 Owners Manual says
    Hammock storage, care, sealing
    ...Do not seal your rain fly unless you find a reason to do so. Seams can
    lose integrity from being jerked or pulled over time. If you find a spot that
    needs sealing, use Sil-Net by Mcnett, or another product that is formulated
    for sil-nylon fabrics.

    Is there any reason to seam seal a new XL or Vertex tarp? Thanks

  2. #2
    Senior Member DemostiX's Avatar
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    Like Lewis & Clark: Wintrin' o/t Columbia again: PDX
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    Don't want you to feel ignored. <smile>

    The only top-side leakage on any of my Clark rain-fly / tarps was from hardware attachment points within the ridgeline seam. Those are no longer used by Clark.

    I have found water in some but not all of the 3/4" Clark lower edge tarp hems after nights of rain. The hem is actually swollen with water collected at the low point. I squeeze the water out between fingers before wrapping up the tarp. Would I treat the hem with sealant? No, but if someone did, she'd need to allow a place for the water to leave, as well. Some canvas workers use nylon thread, claiming it expands slightly when wet, reducing leakage.

  3. #3
    Senior Member Lorax's Avatar
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    Apr 2010
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    Wisconsin
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    WBBB (1.7,1.1) Nx-200 and ENO DN
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    Same here. The only place my tarp ever leaked was where the seams all came together and hardware was attached to a black nylon loop. It left quite a puddle. Large enough to wonder how this wasn't an issue before.
    I took care of it myself and hasn't leaked since.

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