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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 98%

Tim-Bor Insecticide

Product Q & A

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Browse 2 questions Browse 2 questions and 3 answers
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.
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.

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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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