quote amuller:
I used to use this stuff but many people have found it to trap water and rust the tank. If I were to use it now I would just put a few short pieces at the corners.
I just applied another similar product (sold as "truck and van door trim") to one of my tanks. I think I’ll drain it this winter, clean up the rim and give it a good couple coats of paint before I put the protector back on.
For years we used a rubber mat and while it protected the bottom of the boat (fiberglass) it always trapped water and grunge under it