HD caries a similar ply called "Sande". It's only 3-ply though. I used it to build a 3' x 6' shelf in our travel trailer's storage bay. I was shocked at how light and strong it was. I'm guessing the 4 x 8 sheet was around 10-12 lbs.I keep meaning to buy a sheet of 5mm Revolution plywood underlayment to put on a wall of the van to see how stable it is (it has 5 plys)
I'm going to experiment with it (or the 5-ply you reference) for possible use in walls, ceiling, drawer bottoms and garage cabinet sides.