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Tim-Bor Insecticide

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Tim-Bor (Timbor) Insecticide is a wood preservative that protects buildings and furniture from termites, powderpost beetles, carpenter ants, and other wood destroying insects. It has a long lasting residual and can be applied as a dust foam or liquid with no resistance. Timbor is absorbed into the wood grain and as soon as insects try and consume the wood they receive a lethal dose of insecticide.

Target Pests

Timbor is used to kill termites carpenter ants powderpost beetles and other wood destroying insects.

For Use In

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 be made by drilling and then injecting the solution under pressure into sound wood or into the insect galleries of infested wood. TIM-BOR Professional may be applied as a foam to wood surfaces or injected into wall voids or insect galleries.


Apply TIM-BOR Professional solutions by brush or spray at the rate of 5 gallons of liquid solution per 1000 square feet of wood surface area. Thoroughly wet wood surface area. Application may also be made by drilling and then injecting the liquid solution under pressure into sound wood or until run-off is observed coming from entry/exit holes of infested wood.

Termites and Carpenter Ants: Apply TIM-BOR Professional as is to wood members by drilling and injecting the powder into galleries or by dusting generously on wood surfaces.

TIMBOR Professional powder can also be injected or dusted into wall voids such as between studs, block voids, box sills, eaves, attics, soffits, etc. Apply TIM-BOR Professional powder to these areas at the rate of 0.5 ounce (12-14 grams) per square foot.

TIM-BOR Professional Foam: In wall voids, inject enough dry foam to contact wood surfaces of studs in the wall or the entire desired target area. Apply foam, where possible, to abutting wood surfaces and between wood joints. Apply the foam so that all accessible wood surfaces are covered with foam. TIM-BOR Professional foam can also be injected into insect galleries until run-off is observed.

Coverage Area

Each finished gallon of Timbor solution will treat up to 200 square feet.

Time to Kill

Timbor is a wood preservative and will kill insects when they consume it.

Mix Rate

To use Tim-Bor you mix 1.5 pounds with 1 gallon of HOT water.

Active Ingredient

Disodium Octaborate Tetrahydrate (DOT) 98%

Tim-Bor Insecticide

Tim-Bor Insecticide

Tim-Bor Insecticide is great for the treatment of carpenter ants, drywood termites, wood decay fungi and wood boring beetles. Tim-bor Insecticide is a water soluble borate powder which can be applied as a dust, spray, foam or mist onto wood and cellulosic materials or inside wall voids, cracks and crevices. Depending on the moisture content of the materials, the liquid solution will penetrate to create a protective barrier, and can act as a preservative, insecticide and fungicide. The dust provides an additional layer of protection by killing carpenter ants, drywood reproductives and adult wood boring beetles that enter the structure and pass through it.

At a Glance

*Water-soluble borate powder for use as a dust, liquid or foam.
*Active ingredient is a borate: Disodium Octaborate Tetrahydrate
*Prevents and controls drywood termites, wood decay fungi, carpenter ants, old house borers and powderpost beetles.
*Won’t discolor or stain wood surfaces.
*Won’t corrode screws, nails and other components used in construction.
*Spec Tim-bor Professional for wood treatment in conjunction with other subterranean termite treatments, such as a termite bait application or a soil treatment (not labeled as a primary new construction termite treatment).
*Spec Tim-bor Professional for whole house drywood termite control.
*Can be specified for use as a replacement for fumigation or as an add-on to fumigation to provide residual protection.
*Highly effective & economical.
*Virtually odorless.
*For interior and exterior use.
*Manufactured with a concern for the environment.

Why Tim-Bor Is So Effective

Tim-bor has a long history of effectiveness and is an efficient, fast and affordable way to treat a structure for destructive pests. Put Tim-bor insecticide in your building  to add protection from wood destroying organisms, moisture and mildew. Builders also appreciate Tim-bor Professional because it can be applied quickly with little or no interference with the building process or crews.

Tim-bor can be used as a wood preservative, fungicide and insecticide on its own or in conjunction with other treatments as a supplement. Because of its application flexibility as a dust or liquid, DIYers can address many treatment varieties with this single product – Tim-bor Professional can be applied as a dust, spray, foam or mist onto wood and cellulose materials or inside wall voids, cracks and crevices.

How it Works

Tim-bor Professional’s active ingredient is Disodium Octaborate Tetrahydrate (DOT), a natural borate mineral salt and micronutrient. 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.

Suggested Products To Add To Your Cart

Try The Red Eye Termite Monitoring Station to monitor possible future termite infestations and stop them before they grow.

Alternatively, you can purchase Reclaim IT Insecticide which is our own patented brand of insecticide and a better value and can be used to form a long-lasting termite barrier.

Make sure you stay protected when handling chemicals with the help of our homeowner safety kit.

Product Q & A

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Browse 4 questions Browse 4 questions and 6 answers
Does it kill carpenter bees?
A shopper on May 10, 2018
BEST ANSWER: If you are asking if it will kill them when they chew through the treated wood, it will not since they don't eat the wood.
Does it prevent carpenter bees ?
sarah j on Jul 18, 2018
BEST ANSWER: It does not. Carpenter bees don't ingest the wood they just chew through it so this does not help with them. Water bottle style bee traps are the most effective thing I have found to kill carpenter bees that doesn't involve me chasing them with a racket.
how often should I apply this product to wood fence?
wonwon on Jun 26, 2017
BEST ANSWER: Unlike Boracare, which comes with an exact warranty time of 30 years in the pest control industry, Tim-Bor does not. Most people consider this the life of the wood, but you can reapply every 5 years. Other herbicides which produced an unacceptable level of injury were MSMA at the highest rate, Confront at the highest rate and all Banvel rates. The herbicide which produced the least amount of injury was Manage. All plots had fully recovered within 30 days regardless of the amount of injury that resulted from the herbicide applications.
can the wood be painted after application of tim-bor?
A shopper on Sep 3, 2018
BEST ANSWER: Yes, paint or prime can safely be applied to Tim-Bor treated wood as long as Tim-Bor is completely dry after treatment and dry to the touch. Once completely dried, there should be no problem.

Customer Reviews

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Quick and Easy
TimBor Professional Borate Wood Preservative, as applied by this nonprofessional person was surprisingly simple to mix and apply. And the positive results were almost immediate. Powder post beetles had invaded by garage rafters and now they are no more.
January 19, 2016

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