Here's a deck we just finished. The builder completed construction in the Spring and told the homeowner he seals decks all the time. In fact he has a couple guys that does nothing but

They called a week later in horror after the builder applied 2 or 3 coats of this Behr crap
We stripped it down and brought her back to new then sealed with Sierra Rustic

Its a 50/50 mix of sierra redwood and rustic brown. Cool color and it goes much better with the brick and landscape.