Board Defense is an insecticide, termiticide and fungicide concentrate for the control of wood destroying insects and rot. It is a very versatile product for the protection and treatment of wood against all wood destroying organisms. Board Defense is a water-soluble white powder. It can be used dry or in solution to form an effective penetrating solution. There are no hazardous solvents and no odors. The active ingredient in Board Defense, Disodium Octaborate Tetrahydrate, is a borate derivative that will not break down over time. Borates have been used as a safe and effective pest control for over 40 years and is a part of the System Three EndRot System for wood rot repair.