by Nathan C » Tue Oct 31, 2017 8:48 am
Seal the exterior seams only. On large shelters pitch it inside out so you can reach all the seams.
The liners don't need to be sealed.
Pay really good attention to the base of the door tieouts, the top of the guyout points, and especially to the butt of the interior door tieout and the interior hang loops. Seal those last two from the inside, but also from the outside, lifting up the flat fell flap where they're sewn in and sealing the base there.
Make sure you cover the edge binding around the stovejack.
To be honest, the seams don't leak much. The door tieout butts, hang loops, guyouts, and edge binding on stovejack being sealed really well does more for waterproofing than the rest of the seams combined.