seam sealing my smd lunar duo outfitter

my buddy did his with Seam Sure from Gear Aid. I think it cost like 7 bucks, and was super easy.

Diluting pure silicone with mineral spirits and seam sealing with that is almost certainly your best option. No need to pay for anything expensive or to over think it. Sounds like you are already familiar with this seam sealing technique so you're good to go!

If you need a seam sealing refresher, just follow the instructions in this video made by Henry Shires:
http://www.youtube.com/watch?v=wuxUcOZYvog

NO
The Outfitter version is in polyester.
Use McNett Seam Grip or Seam Sure as suggested by SMD.

Thanks everyone.I Appreciate the info, franco. I just finished sealing my steatospire 1, and had some product left over, so i was curious if i could use it on the outfitter. Looks like i will be getting some new sealer! Curious to see how a polyester tent works out for the wife and i. I wonder what the final weight will be.

Because it will probably peel off.
However I have seam sealed Epic/PTFE and Cuben and of course silnylon, but never polyester that I can think of right now.

Franco,
I'm still a little confused about the rational here. Why would silicone seam sealing be more likely to peel off of polyester than nylon? Are you saying it's something inherent about polyester vs. nylon, or simply because the underlying fabric is not already impregnated with silicone?

I've always wondered by there aren't silpolyesters out there. Maybe you can shed some light on this too?

Silicone for sticking to silicone, Urethane for sticking to (poly)urethane. Since it's the coating that the sealant needs to bond to, and not the fabric itself, it matters what it's coated with. Silicone or PU.

Hikelight sells these too, and they put it this way:

"The Lunar Duo Outfitter uses a more common and heavier fabric than the Lunar Duo Explorer. The fabric is polyurethane-coated instead of silicone-coated. This gives you a great value as well as a tough, comfortable shelter."

So the regular seam seal and not the silicone sealant.

Glen and Franco,
I'm still not completely clear on a few things stated above…

Glen,
You mention that the sealant needs to bond to the fabric's coating, not the fabric itself. Are you sure about this? Franco (and I'm sure others too) has reported successfully sealing cuben fiber seams as well as Epic/PTFE fabric seams with silicone. Why would silicone work on these seams and not polyurethane coated polyester seams? Neither cuben nor epic use a silicone based coating approach.

To me, sealing a seam either involves taping said seam so that the inner waterproof coating is effectively unbroken, or impregnating the seam and the threads with a very hydrophobic material (e.g. silicone) so that the seam itself no longer sucks water in through capillary action.

Why wouldn't silicone bond to a polyester seam?

I don't recall saying I used silicone for anythig other than siliconised fabric.
I used Seam Grip for Cuben,PTFE and Epic.

Maybe a resident chemist can provide more insight, but from my understanding, it's basically because silicone is solvent based and polyurethane is water based.

Franco,
I asked:
"Why would silicone-based seam sealing not work on polyester while urethane-based seam sealing would?"

To which you replied:
"Because it will probably peel off. However I have seam sealed Epic/PTFE and Cuben and of course silnylon, but never polyester that I can think of right now."

I took this to mean that you had seam sealed Epic and Cuben with silicone. Maybe you can see why I took it that way?

Anyway, it sounds like you didn't mean to say that, so it was just a miscommunication. I didn't mean to put words in your mouth that you did not intend. Sorry about that.

I realize this is an old thread, but i was doing some searches on the SMD Luar Duo Outfitter and saw that there are some definite misconceptions here.

Glen is right.  If a waterproof coating is silicone, you use silicone to seam seal.  If the coating is PU, you use a PU based seam sealer.

It doesn’t matter what the underlying fabric is.

If you’re seam sealing or bonding EPIC fabric, you would use silicone, since EPIC uses silicone for it’s long term, near permanent DWR.  EPIC comes in polyester and nylon treated fabrics.

Cuben could be seam sealed with either PU based seam sealer, silicone adhesive (you want something a bit more aggressive than caulk), or a tape with an adhesive that sticks to mylar/polyester.