Tugger wrote:

... I'm building a wooden compost bin ... and am worried that it will rot as
quickly as the compost ... OK, not quite ... so I guess I need to treat the
wood ... garden organically, so wonder what type of preservative would you
recommend ? Any info appreciated.

The walls of my main compost heap are made from pallets. They
have been there for at least 15 years to my knowledge. I have
not treated them but it is conceivable that they already contained
some preservative.
--
Nick Wagg