Wasting your time with any brush on treatment for ground contact, it will make no practical difference.
It has to be properly pressure treated in the first instance, with a copper organic treatment (like tanalith). And there are different levels of treatment, you need to make sure they have used ground contact treatment levels.
Re-treatment is only worthwhile considering if it is to retreat cut end-grain.
It has to be properly pressure treated in the first instance, with a copper organic treatment (like tanalith). And there are different levels of treatment, you need to make sure they have used ground contact treatment levels.
Re-treatment is only worthwhile considering if it is to retreat cut end-grain.