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Tim-Bor Professional Insecticide and Fungicide

Tim-Bor Professional Insecticide and Fungicide


For protection and preventative treatment of wood* against decay fungi and wood destroying insects, and for remedial control of such pests in infested wood.

Tim-Bor Professional is a water soluble inorganic borate salt with insecticidal, termiticidal, and fungicidal properties. This product can be used for preventative treatment of wood in existing structures (before signs of infestation) and for remedial treatment of wood infested with termites, carpenter ants and wood-boring beetle larvae.

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TimBor Professional Insecticide and Fungicide is recommended for control of wood destroying organisms.  It is applicable for interior and exterior applications, wood and cellulose materials, in accordance with the specific treatment methods described herein. TimBor Professional is effective for all interior and exterior wood (and wood-foam composite structural components) that will be protected from excessive rain and not in direct contact with soil. Types of wood include, but are not limited to, all types of lumber, logs, and plywood. This product is toxic to wood-destroying insects, but surface etching of treated wood by target organisms may occur. The use TimBor Professional Insecticide and Fungicide to control wood-destroying organisms must be part of an Integrated Pest Management (IPM) strategy.

Target organisms TimBor Professional is effective for treatment of wood (and wood-foam composite structural components) against decay fungi, including brown (i.e. Poria), white rots and the following wood boring termites, beetles, and carpenter ants:

  • Subterranean Termites, e.g. Reticulitermes (Termitidae)
  • Drywood Termites, e.g. Incisitermes (Kalotermitidae)
  • Dampwood Termites, e.g. Zootermopsis (Hodotermitidae)
  • Furniture and Deathwatch Beetles (Anobiidae)
  • Powder Post Beetles (Lyctidae)
  • Old House Borers, Longhorn Beetles (Cerambycidae)
  • Carpenter Ants (Camponotus)

How does Timbor work?

When Timbor Professional Insecticide and Fungicide is brushed or sprayed directly onto the surface of timber, lumber, OSB, or plywood, it diffuses deep into the wood fibers and acts as a preservative to protect the wood from insects and fungi, as long as it is not exposed to flowing water. The active ingredient in Timbor (DOT) will not break down, so it provides long lasting protection even as normal moisture changes occur.

  • For Termites and Beetles: Termites and beetles are best treated with a solution or foam application. As Termites or wood-boring beetles ingest or tunnel in Timbor-treated wood, the chemical begins to build up in their systems. The poisoned insect will gradually become more and more sluggish until they eventually die. This delayed-action is beneficial because it allows poisoned insects to continue to come in contact with other termites or beetles so the chemical may spread more effectively throughout the colony. Timbor is also effective against the larvae forms of termites and beetles.
  • For Carpenter Ant Control: Carpenter Ants do not actually ingest wood; however they do cause significant damage by excavating wood galleries for nesting purposes. Wood treated with a Timbor solution or foam is not excavated by carpenter ants because they find the texture unpalatable. Timbor powder injected as a dust treatment into wood galleries and wall voids will provide excellent carpenter ant control. This powder collects on the ant’s body and is later ingested as the ant preens itself. Note: Timbor should not be used as a stand-alone treatment since the carpenter ants can still penetrate the construction without chewing into the treated wood.

Additional information


1.5 lb. Packet, 6 Gallon Pail


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