Deck replacement

[Busted Knuckle]

I need to replace the deck of a boat I just bought, and would like to know if what I am proposing will work.
I have seen a hollow cored composite deck material that is tonge and grove, the material however is for home decks, not specified for marine use. It would seem to be lighter weight than most of the deck material because it has 3 hollow cores running the length of it. The thickness is about a inch. I would install it by using sealant between each joint then screw it down, maybe with brass screws? Let me know what you think. Thanks

Here is the link, they also have a 9" X .5" board that I think could be used for tirm and other uses.www.nexwood.com/deckprod.html