You will need to do 2 application of Bora-Care. After applying first coat you will wait 20 minutes and then add the second coat.
Bora-Care is a one-time treatment unless the wood is removed or water conditions like exposure to rainfall or flooding weaken the treatment. If you are applying 2 coats of Bora-Care because you can only access 1 or 2 sides of the wood to be treated, then you need to wait at least 20 minutes between coats, allowing the Bora-Care to absorb before applying the second coat.
Bora-Care is a one-time treatment unless the wood is removed or water conditions like exposure to rainfall or flooding weaken the treatment. If you are applying 2 coats of Bora-Care because you can only access 1 or 2 sides of the wood to be treated, then you need to wait at least 20 minutes between coats, allowing the Bora-Care to absorb before applying the second coat.
Please view the full product label for more information.
The Bora-Care will not penetrate the finished sides, you would need to treat the unfinished side with two coats of the product. You will probably need to wait about 20 minutes to an hour (depending on penetration speed) between coats. It will seep as far into the wood as it can, so just depending on how deep that finish you used on the other sides went, will determine how far the Bora-Care can penetrate.
Per Boracare's label you need to allow the first application to dry by waiting at least 20 minutes in between applications. For some applications, like when treating for Subterranean or Formosan termites, you may need to wait at least an hour between applications.
We arent sure we understand what you mean. Boracare is meant to be mixed with water and applied with either a hand pump sprayer that you create the pressure with yourself and spray on until wet but not dripping, or applied with a paint brush or roller. For large beams you would need to be applying it in one of those options and doing two coats to all sides if the beams are more than 5 inches thick in each direction.
You will want to use a slower spray to apply Bora-Care, as the product needs time to coat the wood and not have excess runoff.