I am looking to replace the floor on 24' Moving Truck

Floor needs to be replaced on my Moving Truck

Currently plywood floor 6 4'x8' sheets
Was looking to use 3/4" t&G, with a sealant underneath, and some type of sealant on top.
any other recommendations

good materials here www.f150aftermarket.com

i have built a couple trailers here and there at home. and i find that a solid sheet of metal works great. you can get a 1/4 inch piece fairly cheap and never have to worry about rotting wood etc. If you use multiple sheets of metal you can get a flat weld done so its smooth. Only thing is thats its a little slippery when wet. But there is a material that you can spray on that seals and gives a little texture for grip. If you have a ramp and not a lift gate on the back i find welding a thin metal mesh to the ramp is great for grip walking up and down.

-Jsaw