Does anyone have 1st hand experience with Sure step (polypropylene) vs Thru Flow (made from virgin plastic reinforced with fibreglass).
Working with it.
Long lasting aesthetics/color/etc...(southeast/Gulf weather)
Tide/Storm surge resistance.
Thanks,
Tom

I have no experience working with it, but can tell you I was recently researching both options for a dock rebuild project, and have moved away from it as an option due to 5' max lengths available.