Had this very same question a year or 2 ago.
Here is a link to the post.
http://www.clubcobra.com/forums/show...ht=deck+sealer
I used Behr and am very happy with the results. Despite what is on the label(as mentioned already) it is an annual event.
Thompsons at least the old stuff---stinks maybe it has changed??
Next time I am putting in a patio or concrete!