Making a cutting board that won't warp

A wooden cutting board that won't warp from getting wet.
woodgears.ca/kitchen/cutting_b...
100s of people have "told" me about mineral oil. I was hoping I'd explained my situation. Apparently not obvious enough for youtube people.
Since people can't be bothered to read the description, and I'm tired of the same comment over and over again, I have disabled comments on this video,.