Board defense borate powder is an EPA registered insecticide, termiticide and fungicide concentrate for 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 tetra hydrate, is a borate derivative that will not break down over time. Comes in 1-Pound bag.