Board Defense is an EPA registered insect poison, termiticide and fungicide concentrate for the control of rot and wood destroying insects. This exceedingly adaptable concentrate secures and treats wood against all wood destroying organisms. Board Defense is a water-dissolvable white powder. It can be used dry or in solution to form a successful penetrating solution. There are no unsafe solvents and no smells. The active ingredient in Board Defense is Disodium Octaborate Tetrahydrate, a borate subsidiary that won't separate over the long haul. Borates have been utilized as an effective and safe pest control for over 40 years.