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  1. #441
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    I don't remember anyone trying 2 part. I've only used it once many years ago to make a mold. Can it be thinned or is there a very thin version made?

  2. #442
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    it can be thinned....Quite a bit too we occasionally used to spray paint with the stuff.

  3. #443
    psyculman's Avatar
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    DIY silicon

    I use an industrial spray finish system. I mixed the silicon and low odor (not GREEN enviro) 100% mineral spirits with a shaker device in a 1 gallon can. Then sprayed that on a tarp size piece of 1.1 nylon. And sprayed it again, and again. After 4 coats on both sides, let it dry for 24 hr. It did not build up to a 'rubbery' coating. But....it came out not even close to waterproof. I just wouldn't build up and close the fabric weave.
    Never more than one man left behind, so far !

  4. #444
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    What dilution ratio did you use?

  5. #445
    psyculman's Avatar
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    diy silicon

    Quote Originally Posted by gmcttr View Post
    What dilution ratio did you use?
    The dilution was the same as the prescribed ratio here on HF, I think 3 parts mineral spirit to 1 part silicon caulk. By weight it came out to about 1 quart of mineral spirits to one 10oz. tube of GE silicon caulk. It sprayed on great.
    Never more than one man left behind, so far !

  6. #446
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    DIY silicon

    ok, I just sat and read 45 pages of posts, replies, and comments. So just a few questions.
    1. If you have the material, is it cheaper to do this vs. going out and buying silnylon?
    2. Do you sew the tarp, since I am wanting to do a winter or 4 season tarp, before you waterproof it?
    3. Does anyone have a pattern to a winter or 4 season tarp? I seen a couple of pics but none with dimensions and I would prefer not to have to reinvent the wheel..so to say.
    4. If you have to set it up, I assume it would be the same way that you would pitch the tarp, when they say they brushed both sides is that the left and right sides or is that the inside and the outside?
    5. Finally, I think, will the mineral spirits evaporate when it is cold outside?

  7. #447
    Moderator raiffnuke's Avatar
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    Quote Originally Posted by ge.jeffers View Post
    ok, I just sat and read 45 pages of posts, replies, and comments. So just a few questions.
    1. If you have the material, is it cheaper to do this vs. going out and buying silnylon?
    2. Do you sew the tarp, since I am wanting to do a winter or 4 season tarp, before you waterproof it?
    3. Does anyone have a pattern to a winter or 4 season tarp? I seen a couple of pics but none with dimensions and I would prefer not to have to reinvent the wheel..so to say.4. If you have to set it up, I assume it would be the same way that you would pitch the tarp, when they say they brushed both sides is that the left and right sides or is that the inside and the outside?
    5. Finally, I think, will the mineral spirits evaporate when it is cold outside?
    I can only really help you with #3.


  8. #448
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    Thanks to Raiffnuke... this will be very useful. Thanks again

  9. #449
    Senior Member bowl-maker's Avatar
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    The Winter Tarp Rocks

    +1 on the Winter Tarp from Backwoods Daydreamer!

    I made my Winter Tarp from that design, and I love it!

    I added velcro to the doors, and PVC across the top.
    Attached Images Attached Images

  10. #450
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    @ ge.jeffers

    To answer the question of why anyone would want to go through this awfully messy procedure, it is certainly NOT cost! Silnylon is cheap and it's reliable. Homemade versions either leak or the silicon is so thick that weighs significantly more than commercial silnylon. Or worse yet, both!

    The ONLY reason I can think of to do this is that you want a camo tarp in 1.1oz/sy or lighter. A commercial camo silnylon doesn't exist at this weight. I think I would rather throw a couple of vines over my tarp to "camo" it.

    But if you feel that you must do penitence for some past evil deed, you meed ti scrape the first couple of coats into the top side and bottom side - not just spread it on the surface.

    Commercial silnylon is IMPREGNATED with silicon (as opposed to a PU "coated" tarp. The silicon needs to get down into the fabric to fill the voids between the weave. The last coat can be left in the surface. And yes, the tarp needs to be pitched tight and left standing to dry.

    Silnylon 30d seconds (which is fine for a tarp) can be bought for $5.50 per linear yard, 62" wide at www.diygearsupply.com
    Mike
    "Life is a Project!"

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