Vycor - I had to look that up.
https://www.diyhomecenter.com/grace-vycor-deck-protector-4x75-roll-45639
Interesting. I did something like that before people did stuff like that (
afaik). I used annealed copper to top the joists.... about 4" wide, soft enough to form folds off each side of the joist. That was 20 years ago, they still look great.