Boracare is specifically designed to be applied to plywood and any other raw wood surface that hasn't been stained or finished with anything like paint or a sealant.
Yes, BoraCare may be used on wood that is currently and/or previously infested by termites. Please read the product label for complete use instructions.
When mixing Bora-Care, it is recommended to use hot water to make it easier to dilute it. The water should not be scalding hot, it should be a warm/hot temperature that will also be safe in case it splatters. It is recommended to dilute in a bucket first before putting it into the sprayer. The solution should not clog the sprayer if it cools but it would be best to use the mixture within 24 hours and not store or leave product in the sprayer because of the possibility of it being clogged after a long period of time.
When treating an active infestation, Bora Care should be used at a 1:1 ratio on raw wood. It appears that the product may not have been applied at the correct rate to get control of the active infestation. Please be sure to review the product label for more information and complete application instructions. Also, please take a moment to review our Powderpost Beetles article here for more information on this pest. Boracare will last for the life of the wood but will only kill the beetles that are active and feed on the wood so you can still see activity as they can lay dormant for years until conditions are right for the young to hatch and become active.
When you apply Bora-Care, it is best to allow it to fully dry before being in the same room as the treated wood.