[Closed] What sealant for a shed?

Got a newish shed and want to ensure it stays looking that way. I don't want to stain it, just want to protect the wood.

I have some eco-sound timber treatment stuff that I had for my last shed but I don't think it is what I need here. When I read the instructions it seems to suggest it is more for preserving rather than waterproofing (perhaps it is one and the same) but when I used it on the old shed water soaked in and I want it to bead up and roll off.

If I was at home I would go and get the tin out and read it but I'm not :-/

So - what is the best stuff to protect wood?