I did not get a second layer done because the rain hasn't stopped here in 3 days........but good news is that I have no water issues at all
I'm very satisfied
They're probably so much lighter weight than regular PU tarps because there is such a thin layer of PU coating on them that it doesn't last long.
Now I just need to do the other large Guide Gear Tarp and the 2 smaller ones. For what little time it took me, and very little in cost, I am thrilled to have a solution and be back to the coverage of these tarps that I so love.