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  1. #21
    Senior Member 6 feet over's Avatar
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    I've read before that materials can be made water resistant by coating them with regular Thompson's Water Seal.

    Has anyone tried this?
    The harder I work, the luckier I get.

  2. #22
    MacEntyre's Avatar
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    Quote Originally Posted by 6 feet over View Post
    ...Thompson's Water Seal.

    Has anyone tried this?
    I have, with disastrous results. I never tried again, nor did I bother to find out what I did wrong. The material I treated was ruined.
    "We must, indeed, all hang together or, most assuredly, we shall all hang separately." - Ben Franklin
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  3. #23
    Senior Member fin's Avatar
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    The Thompson's water seal works, but like any DWR coating, it eventually start to peel. And it makes your fabric HEAVIER, MUCH HEAVIER.

    The more I work with fabrics and do different projects, the more I am starting to think that if you want lightweight, waterproof sil - buy it. Don't guess, don't try to find a cheap deal - if it really matters and you really want it to be lightweight and waterproof and you have confidence in your DIY skills, just pay the 7.95/yd and buy what you need from Ed or others. The stuff that Brandon makes his bishop's sacks with is awesome. I'd love to get my hands on some real, earth tone or camo 1.1 silnylon (like Brandon's black or dk blue sil,) and would pay full retail just to have the "real" stuff on hand for different projects, like a lightweight full-length poncho/undercover combo. Everything I have been able to find has been either untreated, 1.9 or heavier, DWR, or not sil at all. I have found lots of waterproof fabrics, but never 1.1 sil locally.

  4. #24
    stormcrow's Avatar
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    Beating a dead horse

    The wife is out getting supplies for doing the silicone treatment right now. She said.."Are you still going to try to save that poncho?" I told her "Heck yeah, unless you want me to buy one!" Plus, now I am a little proud of it so I want to make it work. Also, I have a lot of that stinkin gray cloth that i have to make stuff with. MMM, I might try to make a 2 layer light weight hammock.

    Adam

  5. #25
    Senior Member fin's Avatar
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    Adam, look at it as "improving your skill set" or "adding another tool to your box." Doesn't hurt to try it once - it only takes time.

    You don't know how much fabric I have that I "have to make something with."

  6. #26
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    Quote Originally Posted by BillyBob58 View Post
    Isn't it waterproof to 1 or 2 psi? Which isn't much, but still enough for most of our uses.
    Those numbers are what Jim Wood had in his article.

    Silnylon versus calendered DWR rip stop nylon-- silnylon doesn't have frayed edges when cut like rsn and you can't suck air through it like you can with DWR.
    Youngblood AT2000

  7. #27
    Senior Member fin's Avatar
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    Quote Originally Posted by Youngblood View Post
    Silnylon versus calendered DWR rip stop nylon-- silnylon doesn't have frayed edges when cut like rsn and you can't suck air through it like you can with DWR.
    The good news is that if it is calendered ripstop, it should suck in the waterproof treatment pretty well, as the stuff is so darn porous.

  8. #28
    thorwren's Avatar
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    Crap......You discovered my stew secret. Back to the drawing board. Shug, where'd you throw that cat?

  9. #29
    Senior Member headchange4u's Avatar
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    Check out this article. It's long but very informative. Talks about just HOW waterproof some materials are.
    “Light thinks it travels faster than anything but it is wrong. No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it." -Terry Pratchett



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  10. #30
    stormcrow's Avatar
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    Great article

    I think I had read that some time ago and I am glad you found it for me again.

    Adam

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