Home Depot carries this "TriCoPolymer VOC Free Non Toxic 1 gal. Clear Satin Fence-Seal" but I always wonder just how non-toxic something actually is. Does anyone have any more information on this particular product?
I see; well, I used to be a mason, a brick layer. What I can tell you about sealing things, is that it is great for about a minute, then the coating gets tiny fissures and allows moisture in, anyway, where it is trapped. With masonry in particular, what that means is, when it freezes it pops all the faces off your bricks, and makes the wall crumble. Never paint masonry that is exposed to the weather! I can't imagine something that holds moisture against wood, would be any better, but hey the world of consumerism provides lots of things to us that we really dont need!