Welcome to the forum
We use non skid tread on the sides. I suppose it would work for the top too. We place a Piece of 2” wide 3” long strips spaced near the top/bottom. Clean the membrane real good before you stick it. Can’t say we’ve ever had to put a strip on the top.
2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.