jonboat bottoms

[sshuffett@hotmail.com]

Locally old jonboats had plywood bottoms approx. 3/8" does anyone know what type it was or what would be best to use?
stan in Ky

[Pelican]

I have been using A/C exterior Fir. Main thing is to be sure to seal the edges. I like West System but it is just a matter of personal choice.