I was wanting to put a polyurethane clear coat(for durability) on the reclaimed oak that I am redoing the porch with. Spar/Urethane is not for foot traffic, regular polyurethane is not for outdoors. Everything I have found does not fulfill what I wanted. Is there a product out there that is clear, durable, and for outdoor use on wood? Or should I just use a water sealer like Behr or Thompsons?