I bought a CCS 15x15 tarp earlier this year. Tonight I hung it up to seam seal it.
Either I'm doing it wrong or there is no way one can seam seal a double row of stitching on the 45 feet of seams along the ridge line and down each side with the single tube of sealant that came with the tarp. Took me 1 and 3/4 tubes of Silnet. Not sure how effective of a job I did either. Guess I'll find out next week. LOL

My guess is that you put it on too thick. I have a 10 x 16 CCS tarp and I had to get a second tube to cover a small area, but that sucker doesn't leak a drop, so I look at it as a good investment. FRED

It's only needed on the inside seams. No need to seam seal the edges.

Agreed. I only did the inside seams.
There is a seam across the ridge line and two seams descending from the ridge line to the hem (edge) on each side of the pitch. A total of 45 feet of interior seams.

The edge hem would be another 60 feet of seams but sealing that would serve no purpose obviously. LOL

I also pitched the tarp so that I could seal the seams while under tension (as per instructions). Being such a large tarp that made reaching all the seams a bit challenging.

That said, I'm looking forward to having a comfortable dry place to hang out should the weather turn foul. I just hope a falling tree doesn't take out this new tarp.

doing the math, your tarp has an extra seam over Freds. So if he ran out I would expect you would too

And its just the inside ( the folded over part ) that needs to be sealed,

I taped my tarp when I seam sealed it so I would use less and also not get it all over the place on the tarp.

quote OldFingers57: "I taped my tarp when I seam sealed it so I would use less and also not get it all over the place on the tarp. "

I'll remember that when I do my 10x10.
After I replace the tube of sealant that I "borrowed" from it. LOL

quote ObiWenonahKenobi: "

quote OldFingers57: "I taped my tarp when I seam sealed it so I would use less and also not get it all over the place on the tarp. "

I'll remember that when I do my 10x10.
After I replace the tube of sealant that I "borrowed" from it. LOL "

Doing that way I only used about 1/2 of the tube that came with my 12 X12 tarp.

quote OldFingers57: "I taped my tarp when I seam sealed it so I would use less and also not get it all over the place on the tarp. "

Great idea! Just got a new-to-me Lean Plus, and I am going to reseal the seams using this idea. Thanks!

quote OldFingers57: "I taped my tarp when I seam sealed it so I would use less and also not get it all over the place on the tarp. "

Good idea. Did you use blue painters tape?

Guys after sealing the tarp a little talcum powder on top of the seam seal will help it not stick together when folding or stuffing. That is if you don't want to use tape
Nothing more annoying than having goo all over the place on your tarp when erecting it.

quote yellowcanoe: "Guys after sealing the tarp a little talcum powder on top of the seam seal will help it not stick together when folding or stuffing. That is if you don't want to use tape
Nothing more annoying than having goo all over the place on your tarp when erecting it."

Won't that make my tarp smell like a baby?

quote mc2mens: "

quote OldFingers57: "I taped my tarp when I seam sealed it so I would use less and also not get it all over the place on the tarp. "

Good idea. Did you use blue painters tape?"

No just regular old masking tape.

You might have applied it too thick. My 10x12 came with one tube, maybe a 15x15 should come with 2 tubes. I barely had enough for my tarp. The tape idea sounds good.

quote ObiWenonahKenobi: "I also pitched the tarp so that I could seal the seams while under tension (as per instructions). Being such a large tarp that made reaching all the seams a bit challenging."

I've always staked mine taut on the ground to seal them.

I'm just curious... Did you guys buy this online or from MWM? When I got it directly from them, they told me there was no reason to seam seal it because of how they stitch it. Never sealed mine, and never had a leak...

My 10x12 came with a tube of sealer. The directions said how to do it so I hung it up taught and applied the sealer as it explained. I still have well over half the tube left from that original run. I've never had any leaks and have enough to do the same thing at least 2 more times.