Bond a fiberglass scoop to a steel hood
I've had a few projects which included load-bearing add-ons for aircraft. The installers always used Hysol as a 'liquid shim' and panel bonder. In the past, I never had any kind of resin permanently stick to metal, and things eventually cracked - until I used Hysol. It's serious stuff and has some pliability to it which resists cracking. It takes paint and primers well, and doesn't feel 'gummy', but isn't so hard as to be super brittle either.
We used it on various other sub-assemblies for a while, but went back to rivets because at least they could be drilled out. We could never separate any sheet metal or other components which had been bonded without destroying the parts involved. It's also highly chemical resistant.
We would typically sand both the bonding surfaces with 25-40 grit, bond with hysol, then use a skim layer to fillet/blend the panel line if desired. I think the stuff typically works up to .250" thick too.
I believe that we used Hysol 9394, but it could have been another. I know we tried two, and one was much preferred for it's longer pot life and superior bond strength.
I've never used it for a scoop, but in all the applications I did use it for we never had an issue with it flaking or cracking. When I do eventually install my scoop, I plan to use hysol for that reason.
I've had a few projects which included load-bearing add-ons for aircraft. The installers always used Hysol as a 'liquid shim' and panel bonder. In the past, I never had any kind of resin permanently stick to metal, and things eventually cracked - until I used Hysol. It's serious stuff and has some pliability to it which resists cracking. It takes paint and primers well, and doesn't feel 'gummy', but isn't so hard as to be super brittle either.
We used it on various other sub-assemblies for a while, but went back to rivets because at least they could be drilled out. We could never separate any sheet metal or other components which had been bonded without destroying the parts involved. It's also highly chemical resistant.
We would typically sand both the bonding surfaces with 25-40 grit, bond with hysol, then use a skim layer to fillet/blend the panel line if desired. I think the stuff typically works up to .250" thick too.
I believe that we used Hysol 9394, but it could have been another. I know we tried two, and one was much preferred for it's longer pot life and superior bond strength.
I've never used it for a scoop, but in all the applications I did use it for we never had an issue with it flaking or cracking. When I do eventually install my scoop, I plan to use hysol for that reason.
