Best way to waterproof OSB blind walls?
 

I'm looking for y'all's vast experience before I finish off my new blind. I built my 4x6 blind with OSB and I want to make sure it doesn't just flake away in the Texas heat and humidity. What is the best way to waterproof the OSB walls? I don't want to spend a mint now, but I also don't want to have to reskin it in a year.

My thought was a basic water sealer, primer, foundation sealer, or roof sealant, before painting it....

What worked for you?

All I did was bought two gallons of valspar exterior paint. I put two coats on all OSB and pine. I didnt bother painting the treated lumber. Im not sure how it will hold up, as I just put up 2 5x5 blinds. I guess we will find out in the years to come. I made drawings and cut lists before I went to my property. I pre-cut all material and painted before assembly. It made it easier than trying to paint after they were built.

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Buy a few cans of tenting waterproof spray.....works great!