Trimlok Window Gasket Material - Anyone used this?


I am still on a mission to build 3 front/side curve windows for our TD vs just buying one for the flat space in the front only.
Has anyone ever used this material. It seems like a relatively easy process if I had some lexan to cut the window out of, and use this for the seal.

I even found a Youtube video on it that looks easy... famous last words right?
Thought, concerns?