Hey, thinking out of the box here. I am aware that we tread unproven ground.
Still, maybe someone has given it a try.
We have a XPS foam shape which we would like to laminate over with
epoxy & biaxial glass.
As XPS is closed cell I know that laminates glued to it can peel off, especially if its a hand lay up without vaccuum.
Now here comes a bit of an unconventional idea. Maybe someone has tried it?
How about using 5200 or something similar to stick the first (thick) layer of dry
fiberglass (without epoxya) onto the 36grit sanded XPS foam and then laminating onto that "dry" glass layer from the outside.
The total glass layer is 5-8mm thick and the foam is primarely a former for a fairing. The foam is completly encapsulated and can not go anywhere.
Could that
work better than laminating straight onto the XPS foam?
I KNOW that is unvconventional thinking, but I do wonder if it COULD
work.
Especially knowing that 5200 sticks like hell to all sorts of materials. Thoughts ideas?
Thanks!
Btw. 5200 is a one pot
polyurethane, what separates it from other
polyurethane glues?
Are there similar formulations used on an industrial scales which do not carry a premium "marine"
price tag? Brand names? Recommendations?
As the stuff is not exposed to sunlight at all we could perhaps use a cheaper alternative?
How about this:
https://samaro.fr/pdf/FT/HBFULLER_FT...5-45___FR_.pdf