What you do is take two seperate portions and mix them together and apply it with a brush. Once it hardens it forms a clear plastic like layer and will keep all of the moisture and water out. This stuff is used to seal wooden boats so the wood doesn’t wear out from being in the water. It is fairly expensive, around $50-$100 a gallon so plan your job accordingly. If you’ve ever been to a restaurant or bar that has wooden tables with pictures and coins and crap sealed under "plastic like" stuff on the table top, this is what that is. I would recommend using this same stuff on anything wooden that you plan to keep outside year round. Call a few of your local boat dealers/repair places and I’m sure they will be able to lead you where to go for it. I’ll paste a link to a PDF that helps explain what I’m talking about.