Tim from Holden, Ma writes
When applying Bora-Care to structural wood in the home, you only need to apply the product once. It will last for the life of the wood. If you are applying to exterior wood like a deck, porch, or fence which is exposed to rainfall, then you would either need to use a water sealant after the Boracare is dry, or you would re-apply Boracare after about 3-5 years.
Answer last updated on: 08/14/2019
