[russcc]

I have used SEM Rust Shield with the catalyst over the years, and it has stood up to many winters of driving a Jeep here in the Northeast. I have used it on the '40 frame, and trunk floor. I have also used their dual mix structural adhesive, and self etching primers SEM has excellent tech support, call Dave at 800 831 1122 and run your particular scenario by him for his perspective. SEM is in NC.