Timbor is a dry product that when mixed with water creates a liquid borate wood spray that is known to kill termites. When used in its dry form, Timbor is an insecticide which can be applied to small cracks, to prevent insects from entering your home. Timbor has been known for treating wood against infestations of termites, beetles, ants and other wood destroying organisms. One pound of Timbor is required with each gallon of water. This concentration will treat approximately 200 square feet of wood surface. Each one pound container of Timbor costs approximately $13, while a 25-pound container can cost up to $90 online.