no issues, the seam-seal hasn't peeled anywhere (like it did on my Old Man Winter)
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Hi, why do they put silicone from the inside ? I would put it from the outside only, for better access to the stitch. And it covers all. From the inside you dont cover the space between grosgrain and the fabric. I think.
I'm not 100% certain on this, although I am 100% certain that if I'm wrong somebody will correct me on it.
but I think it's partly for aesthetic reasons, because it means the sealant is applied on the inside, instead of the outer surface. you will notice that commercial tents and waterproof clothing that have seam tape applied, it is also applied to the inside. Personally I don't really care about the aesthetics of it. Those kind of aesthetics only apply when you expect other people to be looking, and I don't know about everybody else but when I'm in the woods, I'm usually looking at the underside of the tarp, or out at the world, for the short period of time while my eyes are open.
Aesthetics aside, it means that the sealant itself is out of the weather and less likely to be a abraided slowly over time by dust and branches etc, although I'm not sure how much effect that has in the long run.
In terms of hydrostatic pressure, seam-sealing from the inside is more than enough when not submerged as is the case with a dry bag intended for boating, although even with those the expectation is that it should float which means it won't be fully submerged to any serious depth.
With regards to commercial tarp makers, sealing on the inside means that they can make it just as waterproof but use less sealant. This means a lower-cost tarp for you, but at the same quality level. As an example, in the case of a standing seam Ridgeline, it means you're applying one bead of sealant down the length of the Ridgeline, to seal the two panels together...whereas if you do the outside of the standing seam that means you're running two beads down either side of the grosgrain, plus you have to try and fill the space between the fabric and the grosgrain.
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I sealed inside and out on my tarps, none of which have ever been rained on so hard to know whether it was a good job.
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Thanks, might be that case
I think it might be that inside is more protected from UV degradation. Maybe also protected from some wear as I’m guessing most fold their tarp so the outside surface is out. A tire company gives us plastic bags around the snow tires when they swap them out in the spring. All summer long that bag is exposed to the sun. By fall, the bag is partially brittle. Of course the tarp is not exposed to sunlight day after day after day. There is no harm in sealing both sides. I’ve never experience (yet) leakage with just the interior seams sealed.
Last edited by cougarmeat; 09-28-2020 at 11:55.
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