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Tim-Bor Professional

Tim-Bor Professional Insecticide (also a fungicide) is a water-soluble borate powder that acts as a wood preservative, fungicide and insecticide to control and prevent wood decay fungi, drywood termites and carpenter ants.

The active ingredients are: Boron sodium oxide (B8Na2O13), tetrahydrate (12280-03-4) 98%.


Tim-bor Professional’s active ingredient is Disodium Octaborate Tetrahydrate (DOT), a natural borate mineral salt. It is manufactured for use in the form of a water-soluble borate powder. Once it’s applied in a liquid form by foaming, misting or spraying onto wood or other cellulosic materials, the borate active ingredient creates a protective envelope and remains for years of protection. Often Tim-bor Professional is dusted into places like wall voids where pests like to hide as an additional protection. When the dust gets on the insects, they clean themselves and consume the boron during the cleaning process.

Common Remedial and Preventative Treatments with Tim-bor Professional

  • When applying Tim-bor Professional to exterior wood, you can use a standard gallon sprayer. For instance, you can use a simple garden sprayer when applying Tim-bor to bare logs, wood and bare wood siding. If the wood is sealed or painted, the sealer or paint must be removed before application, then apply Tim-bor using a gallon sprayer. If the sealer or paint cannot be removed, you can drill and inject this wood preservative as a liquid or foam into the wood then plug the hole and finish the wood. After this application, let the wood sit for at least 48 hours before applying paint, stain or sealant.
  • Tim-bor can be applied to attics to help kill and prevent drywood termites. Use Tim-bor as a liquid solution and spray top plates, plywood, rafters, drywall backing and OSB panels. For areas that already have insect, termite and/or decay fungi infestation, drill and inject foam or liquid Tim-bor.
  • Before applying Tim-bor to wood decks, ensure that you remove any sealant, debris and dirt from the decks. To check for sealant, put a drop of water on the board and if it beads up, there is sealant. If it soaks, in you are OK to apply Tim-bor.
  • You can also dust attics with Tim-bor to help kill insects before they infest the wood.

The Science Behind Tim-Bor Professional

DOT is a natural form of elemental boron, which is essential for the healthy growth of plants and believed important in human calcium metabolism. Because animals and humans simply take what they need from their diet and rapidly excrete any excess via the kidneys, DOT has a low acute toxicity and is very effective against insects and fungi that do not have the same excretion mechanisms.

DOT maximizes the solubility, the rate of dissolution and the boric oxide content to give a borate active ingredient far superior to traditional boric acid or borax. At the levels used in Tim-bor Professional applications, it prevents pest infestation by inhibiting pest metabolism on a cellular basis. The tetrahydroxyborate anion forms a chelate complex with the cis-adjacent hydroxyl groups in the ribose sugar of nicotinamide adenine dinucleotide (NAD), with the cationic nitrogen of the nicotinamide moiety providing electrostatic stabilization of the chelate. In this configuration, NAD and NADP cannot be used by the dehydrogenase enzymes of glycolysis, the pentose phosphate pathway or the tricarboxylic acid pathway, and so the cellular energy generating mechanisms, including adenosine triphosphate production, are shut down.