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Is that tarp cat cut ??

A DWR cloth will wet through after a while.
This particular fabric is not even DWR though. Just plain nylon and
I had that wet experience way back.

IMO Waterproofing is a good thing when it...

I have this desire to build a one piece tarp and I probably wont get it out of my system until I do.

Still a couple of inches does not matter so I might look around a bit at wide sil.
I found...

So whats the best method ??
Have read 4:1 mineral spirits to 100% clear Silicone.

Reason being is I have about 35' of 68" wide 1oz ripstop in dark green.
Right color, right weight and wide.

I...