Alan from Gordonsville writes
When applied outside it is very important to seal the treatment by using a sealant material, like a Thompsons water seal to lock in the protection, otherwise it can fade due to excess moisture being absorbed into the wood. Bora-Care can only be applied to raw wood and after it is applied to wood outdoors it must be sealed. However, you could apply it each year if you wanted to, but it is not necessary if you seal it.
Answer last updated on: 02/23/2022
