I did some testing on this a while back.

West systems epoxy /1 inch wide fiberglass tape on bare aluminum sheet
1 square inch of adhesion area
peel strength tested

No surface preparation --- less than 1 pound of force peeled it right off.
sanding --- not much better - maybe 2 pounds of pull
Sanding and etching --- At least 20# - broke the fiberglass tape, and
it never did come off.

If the surface is prepared properly, with etchant, it will work. Otherwise
forget it.


Ron Webb



wrote in message ...
I've got some slight cracking in my aluminum nosebowl and have stop
drilled them twice.
I'm considering backing the cracks with fiberglass in hopes to keep the
vibration down.
How well does fiberglass adhere to aluminum?
What system is better.
I have easy access to the West system chemicals.

Any hints? Alodine first?

Thanks

Dave