Apply this to your board?

[BaNZ]

I would never have to worry about water getting into the board! So shouldn't it make the board go faster as well?

[oldmansurfer]

Maybe apply it to your iPhone or your surfshorts or your rash vest but surfboard probably will have less friction if it is rough enough to hold a layer of water over it's surface .....at least that is the theory I have always heard and in my meager testing it seems to hold true