Of recent years I've used Cuprinol 'Garden Wood Preservative' (Autumn
Brown) but is seems to be off the market?

Any ideas for a good replacement that doesn't need re-treatment in less
than 5 years?
I've one fence 2.5m x 35m and another 1.8m x 25m. Both 35+years old and
with nearly all posts now supportd by concrete spurs. It doesn't all get
done in a single year, but it would be nice if the weather colour was
consistent!
Creosote is definitely off-list although for first 15 years that was the
choice.

I found that water based ones seemed to be good for a year!

Is this a good alternative?
Barrettine Premier Wood Preservative
see:
http://www.wood-finishes-direct.com/...d-preservative

Jim