Penofin oil. It comes in clear but will darken the wood but it is beautiful. Also comes in toned colors so you can shift towards a red. I prefer the clear.

I know a local guy who builds very high-end redwood furniture and you can't get it from him without Penofin. Contractors also swear by it.

Others should confirm on here I believe.

On Wednesday, June 20, 2012 2:13:53 PM UTC+2, RonB wrote:
I am building a couple of Adirondack chairs from Redwood. I found
some nice clear Redwood for most of the visible slats, arms etc.
Under-structure is construction grade Redwood. This stuff is hard to
find in Kansas.

I want to preserve the color and not let it gray out. I have googled
and found lots of recommendations for oils including teak oil and
others. So many variations I am about as confused as when I started.
A suitable penetrating oil seems to be the way to go. Do any of you
guys have experience with a similar project? They will be outdoors.

Thanks
RonB