Noah's Ark

While musing through the subject of Sodom and Gemmorah on this post

I got to thinking about Noahs ark and how Noah was instructed by HaShem to use pitch. I think I know now how this was done.

This is the passage

Quote :

6:14Make thee an ark of gopher wood; rooms shalt thou make in the ark, and shalt pitch it within and without with pitch.