new redwood deck, south-facing, coastal

Hello,
We have a new kiln-dried redwood deck that is south-facing, getting intense sun, but also wet in the mornings from coastal fog. I'd like to treat the wood with a penetrating semi-transparent product that doesn't crack/peel or need to be stripped before the next application. Any suggestions? I am a total newbie, except that I do treat my teak fence with teak oil every year after one application of household bleach. Thank you!