What to treat sleepers with for garden edging

[Michaelsf90]

I'm putting some sleepers around the edge of my lawn at the back. I plan on sitting the sleepers on broken flags then saving sharp sand underneath for drainage. Just wondering what to treat them with. They come tanalised. I don't want to paint them. Just something that protects and stops uv damage. We also have a rabbit and dog so don't want anything that could cause any harm

Most preservers I find say not suitable for ground contact which these will be semi buried into the ground

 

[RandomGrinch]

I haven't treated mine, but similarly to you, they were laid on a bed of gravel/sand and I stapled DPC to the side that was semi-buried in the grass.
They've been down about four/five years, and so far so good!

 

[Michaelsf90]

Thank you. Its more how they get damaged by the sun as well. The nice new wood colour fades very quickly