PL Premium vs silicone for metal
Trying to figure out the best adhesive for sheet metal. This will be for the new steel going down on the floor supports.
There will be self tapping screws going through as well, but I want an adhesive to help with:
The bottom will be covered in undercoating and the top will be primed and painted.
My concern is avoiding anything corrosive. I don't know if pl premium is and google searches haven't turned up anything. It's polyurethane based.
I know silicone can be corrosive because it is acid curing, but you can also get versions that are neutral curing. I don't know if they are as strong though. Only nuetral I found locally was silicone ii by ge.
What would you use?