Chris Bryant wrote:
That is Filon- not true fiberglass, rather it is fiberglass reinforced plastic. It must be laminated to a backer- usually luan, but azdel is the current choice.
It is true fiberglass. In fact what is commonly refered to fiberglass is more correctly known as GFRP (Glass Fiber Reinforced Plastic), which is exactly what it is.
This is just a special fiberglass product intended to be laminated over a substructure.
I see a fair number of OEM end caps using this product but you need that substructure to attach it to. Personally, I would avoid it as the ones I've seen tend to have frequent delamination.
The traditional end cap is maybe 1/4" thick and shapped to be largely self supporting. It's actually pretty straight forward to repair small holes and cracks with standard fiberglass repair techniques.
Filon is so thin it's tricky to repair small holes and cracks using traditional methods. Often it's simpler to just replace the whole panel.
