Just got a bargain at my B&M.
5 litre tins of Langlow Dual purpose wood preserver £ 0.50p a tin.
they had dark oak and red cedar.
Just had a quick look on amazon its over £20 a tin
Only downside no excuse for not doing the garden fence now.
This is spirit based far better than the water based stuff
The white spirit carrier solvent enables this active to achieve deep penetration into most common sizes of structural timber, allowing the active ingredient to give effective and long-term protection against wood rotting fungi and insecticidal degradation