Timbor Insecticide Termiticide Fungicide - 25 Lbs Disodium Octaborate Tetrahydrate 98% TIM-BOR Professional as a liquid solution: TIM-BOR Professional liquid applications may be made to wood structures including decks, fences, steps, sheds, barns and other outbuildings. Such structures must be protected from excess rain. On wood with drier than normal moisture content, apply by brush or spray two applications of a 10% solution to wood surfaces. On wood with normal moisture content, apply by brush or spray one application of a 15% solution to wood surfaces. Application may also To use Tim-Bor you mix 1.5 pounds with 1 gallon of HOT water.