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4.6 Rating: 4.6

52 Reviews | 55 Q&A 


  Size/Description Price/Ea. Qty  
Timbor bag(s) (1.5 lb. each)

Buy 1 or more: $14.70 each

Buy 4 or more: $9.70 each

Timbor - Box (8 x 1.5 lb. bags) box (8 x 1.5 lb. bags) $64.80
Timbor - 25 LB. bucket(s) (25 lb. each)

Buy 1: $86.56 each

Buy 2 or more: $81.99 each

Total Price: $0.00

Availability: Normally ships in 1 business day.
For large order quotes, please call us at 1-866-581-7378.


Timbor should only be applied for eradicating fungus off of wood and for protecting new wood from future infestation.  If you are treating any wood with an existing infestation, you should always use Bora-Care.  Bora-Care will penetrate through an entire piece of wood much deeper and ensure proper control, and it will protect the wood you are treating forever.  

Timbor is an insecticide, fungicide and wood preservative for the protection and treatment of lumber against fungal decay and wood destroying insects. Timbor is a water soluble, inorganic borate salt with insecticidal and fungicidal properties. It is an effective treatment for wood to kill and prevent infestations of decay fungi including white rot, brown rot (i.e. Poria) and wet rots. Timbor does not treat mold or prevent mold from growing.

Active Ingredient: Disodium Octaborate Tetrahydrate
Target pests: Wood destroying organisms including: Termites, Beetles, Carpenter Ants
For use in: Interior and exterior as an insecticide, fungicide, or wood preservative. Use on untreated wood. 25# Timbor includes a scoop for easy measuring
Application: Can be used as a foam, liquid, or dust. If you already have a powderpost beetle infestion, BoraCare is the preferred product, especially for furniture, because it absorbs further into the wood to take care of the infestation. Timbor only absorbs 1/4 of an inch.
Yield: 1.5 pounds of Timbor will treat up to 200 sq. ft of untreated wood. Use as a dust against several insects. Refer to product label for complete details and instructions.
Manufactured By: Nisus (UPC: 616609111537)

Product Documents

Timbor can be used as a Dust, Liquid, or Foam. It is water soluble, economical, odorless and can be used in conjnction with fumigation for residual protection. It is formulated with a concern for the environment.

Timbor is only absorbed 1/4 inch into the wood and leaves a white powdery coating. If you are treating thick wood or want it to look like its original state, then purchase the BoraCare product.

Timbor FAQ

What is Timbor?

Timbor is a wood preservative that works as an insecticide and fungicide.

What is the active ingredient in Timbor?

The active ingredient in Timbor is disodium octaborate tetrahydrate, a natural borate compound.

What is a borate compound?

Borate compounds are derived from mineral deposits that contain the element Boron. These compounds are use in the production of many products including ceramics, glass and medicines and also work extremely well as insecticides and fungicides.

Why is Timbor considered an insecticide and fungicide?

Insects are exposed to the active ingredient by eating treated wood or by ingestion while grooming. Borates are a contact toxicant to fungi. The borates prevent metabolism of food by insects and fungi causing death.

How is Timbor applied?

Timbor is applied to the surface of bare wood as a liquid. It can also be applied as a dust into void attic and wall void areas for labeled insect control.

How does Timbor work as a wood preservative?

When Timbor is applied as a liquid to the surface of bare wood, it diffuses into the wood to make the wood itself toxic to wood destroying organisms such as wood decay fungus or drywood termites.

Is Timbor concentrate a liquid?

Timbor comes in a powder form that is used as a powder or mixed with water to form a liquid solution. To create a 10% solution mix one pound of Timbor to one gallon of water. This solution must be applied twice to a bare wood surface. To create a 15% solution, mix 1.5 pounds of Timbor to one gallon of water. This solution can be applied only once to the wood surface.

Is Timbor labeled to treat wood decay fungus?

Timbor is labeled for the control and prevention of wood decay fungi including white rot, brown rot, poria and wet rots.

Is Timbor labeled for the control of carpenter ants?

Timbor is labeled for the control and prevention of carpenter ants by applying Timbor dust into active ant galleries and into areas where ants may enter the structure.

What wood destroying organisms is Timbor labeled to control?

Timbor is labeled for the control and prevention of drywood termites, wood destroying beetles, wood decay fungi, carpenter ants and termites.

Can Timbor be foamed?

Timbor can be foamed using equipment designed for foaming applications. Foaming requires a 15% solution in conjunction with a foaming agent. A dry foam is recommended for best results.

Does Timbor affect ornamental plants?

Yes, over spray on plants or spills near the plant roots can kill or retard plant growth.

Rating Snapshot

5 stars   38
4 stars   9
3 stars   2
2 stars   2
1 star   1

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Average Customer Rating
4.6 star rating (52 reviews)

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Most Helpful Customer Reviews
  • 24 of 24 people found this review helpful:

    5 of 5 Stars  Timbor DIY vs Commercial
    By Jeff in South Florida on May 28, 2011

    A national chain quoted me $2,900 to spray the trusses of my new home under construction. I paid about $65 for the Timbor and spent about 4 hours spraying. Absolutely worth it!

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  • 22 of 25 people found this review helpful:

    5 of 5 Stars  Good Stuf
    By Tim in San Diego, CA on October 18, 2010

    The price at DoMyOwnPestControl was better than I could find elsewhere and their support was great. This stuff (borate minerals) has been around a million years and is known to make wood toxic most insects including drywood termites, carpenter ants, ants and wood destroying fungi. It works by dehydrating them. It doesn't kill subterrainian termites, but those are easier to find by inspection (mud tubes). It is as advertised and, applied properly will work. I had drywood termites and ants crawling all over the structure before treating the outside with this stuff and now they are all dead, gone and discouraged. I've covered up the outside wood (siding, shingles, etc.) and so long as the cover remains intact, this stuff will continue to do its job.

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  • 20 of 24 people found this review helpful:

    4 of 5 Stars  Small quantities not available
    By Laura in Moses Lake, wa on April 23, 2010
    Verified Purchase

    Product was easily mixed. Would have preferred directions for mixing smaller quantities on package. Might use BoraCare next time for effectiveness but small quantities of that were not available and it was costly.

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  • 19 of 19 people found this review helpful:

    5 of 5 Stars  Timbor
    By Russ in Lawrence, KS on March 14, 2011

    Easy to use, included measuring cup, just added to water in a separate 5 gallon pail and agitated with a drill and paint mixer, pour into pump up sprayer and saturated walls of older garage. I sprayed twice waiting about 30 minutes between application, for good penetration, had it been spring or summer I might have made several wet on wet applications as the wood was old and dry. I purchased the 25 pound pail and have several more structures to treat. My (former thanks to DMOPC) pest control person said that Timbor was a great low cost addition to a complete termite treatment. I also note that Timbor is especially good at repelling carpenter ants, and fungus which I believe is the cause of dry rot. Thanks DMOPC

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  • 14 of 14 people found this review helpful:

    5 of 5 Stars  Timbor
    By Cathy in Annapolis, MD on June 15, 2010
    Verified Purchase

    The Timbor powder was easy to mix and use & DoMyOwnPestControl made it simple to order.

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Most Recent Customer Reviews
  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Timbor
    By Thor in Three Rivers CA on April 24, 2015

    Love this stuff. Dissolves easily in water unlike other products. Seems to soak in to the wood well. Do My Own Pest control is fast and inexpensive.

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  • 2 of 2 people found this review helpful:

    5 of 5 Stars  Preventive termite treatment
    By Lawrence in Florida on February 6, 2015

    Sprayed on a new construction roof, professional company wanted to charge $900 for the treatment with Timbor. Purchased from DomyownP and saved over $800!!! You can't beat doing your own pest control. Customer service even price matched the price from an other website. Professional products and service!!

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  • 3 of 3 people found this review helpful:

    5 of 5 Stars  The ONLY Anti-Fungal Product We Use!
    By Laura in Durham, NC on December 30, 2014

    We have been using Timbor for over 15 years and it is the best product we have found in our 20 years of business. We use it on joists in basements and crawlspaces to prevent fungus/mold from regrowing when we install our systems. It has a proven track record and we will never use any other product as long as Timbor is available to us!

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  • 4 of 4 people found this review helpful:

    5 of 5 Stars  Log Cabin
    By Terry in Hemphill, Texas on December 11, 2014

    My Grandson and I built a log cabin. We wanted to protect it against wood boring insects. Timbor was recommended. We sprayed the wood with Timbor and saw no sign of wood boring insects. We bought the large pail of Timbor, and since the cabin was all wood, we sprayed the sills, joysts, floor, top and underneath. We sprayed the log walls, inside and out, also the rafters and lathe. We enjoyed the cabin for a couple of years, but unfortunately, it recently burned from a fire started by an unattended wood heater. We are in the process of building another log cabin in the same spot. One thing for sure, we will not be careless with the fire. Also, we plan on protecting the cabin from wood eating pests by spraying it with Timbor. Sincerely, Terry McGraw

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  • 2 of 2 people found this review helpful:

    3 of 5 Stars  timbor
    By Mark in Halifax County, Virginia on November 14, 2014
    Verified Purchase

    I purchased Timbor insecticide, and it was promptly shipped and received. I used the product and was able to complete my interior project with confidence.

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  • 1 of 1 people found this review helpful:

    5 of 5 Stars  Timbor-25 lb
    By Wayne in Portland, Oregon on November 13, 2014

    Performed as expected. The powder easily disolved in water and worked well with a standard sprayer; although over time it tended to clog up the sprayer controls. I had to take the sprayer apart and clean the "workings". The spray seemed to absorb well into the logs; it is still too early to tell how effective it will be in controling insect infestations. The 25lb bucket comes with a 1/2 lb measuring scoop which is helpful if you don't have a weighing scale handy. One minor annoyance is that the sealed lid on the plastic bucket is rather difficult to remove from the bucket. It is the same with all similarly designed buckets and lids--it requires some considerable effort.

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  • 0 of 4 people found this review helpful:

    2 of 5 Stars  timbor purchase
    By Mark in cardiff on September 13, 2014

    Love the product but for free 5 day shipping it took 10 days.

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  • 4 of 4 people found this review helpful:

    5 of 5 Stars  Fast delivery and easy to use.
    By Harvey in Union Grove, NC on July 3, 2014

    First, the delivery was super fast. My order arrived before I expected it. The product was easy to mix. I used warm (sun heated) water from a rain barrel. Fully mixed the powder 1/3 at a time using a paint mixer on my cordless drill. This seemed to be faster than adding all the powder at once and trying to disolve it in the water. The instructions indicate reserving part of the water until the powder is disolved. This worked well to finish the solution. There is a measuring scoop included. It measures 1/2 pound of product. So 15% solution in 1 gallon of water is 3 scoops. I used a chemical backpack sprayer that has a diaphram pump instead of a piston. Using a fan spray nozzle, the application went fairly quick. Time will tell if the product prevents the insects. I sprayed the entire wood frame of my house under construction. Stud walls, sheeting, trusses, floor joists. I plan to spray the wood siding before it goes up as well.

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  • 2 of 2 people found this review helpful:

    5 of 5 Stars  Great Product and Service
    By Don in San Diego, CA on June 15, 2014

    Shipping was fast, but I received the wrong size. Customer service was great. They fixed the problem fast and shipped out the correct item as quickly as possible. I definitely would order again from DoMyOwnPestControl. They have integrity and good customer service. Thank You!

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  • 2 of 2 people found this review helpful:

    4 of 5 Stars  Timbor: Highly Recommended
    By Tom in Magalia, CA on April 12, 2014

    This product was highly recommended to me by a very credentialed pest control expert I called in for a second opinion on a termite report. He saved me a lot of money and charged nothing

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Most Helpful Q&A's

September 16, 2009 Aj asked:

QHow long does a Timbor treatment last? How often would a crawlspace need to be treated?

AThe manufacturer states that Timbor will last for the life of the wood as long as the wood is not exposed to rain or flooding.  It will stay in the wood forever because of how it bonds to the cells of the wood.

27 of 27 people found this answer helpful.
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December 14, 2009 Mike asked:

QCan exterior house paint be applied over Timbor-treated wood?
Will a primer paint, such as Kilz, perform normally when applied to Timbor treated wood?

AAny primer or paint can safely be applied to Timbor treated wood as long as Timbor is completely dry after treatment and dry to the touch.  There should be no issues once it is completely dried.

18 of 18 people found this answer helpful.
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September 13, 2010 Carol asked:

QRecommended termite treatment(s)?
I have an 80 year old wood frame house set on piers over bare earth. I have had problems with drywood termites between the finish floor, subfloor and around the window frames. I have had the house tented twice. I would like to treat the house myself to get rid of any current activity and prevent against future activity. What products would you recommend? I have Timbor that I bought from you years ago, but I am wondering if I should plan on a more aggressive attack with another product?

ATimbor is a great product, but it does not penetrate or last as long as another product made by the same company called Bora-CareBora-Care is the best wood treatment product available because it penetrates all the way through a piece of wood where Timbor will only penetrate the outer coating.  If you have older wood then you should always use Bora-Care. Bora-Care will also stay in the wood forever, preventing any new infestations for years to come.

17 of 18 people found this answer helpful.
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August 13, 2009 Donna asked:

QWould I be able to spray Timbor on the wood myself or should I have a professional do the work?
The mold is under my house in the crawlspace. Is this a toxic chemical that would cause harm to pets if coming up through the floors or backyard wildlife?

ATimbor is not harmful to pets or wildlife.  In fact, this product and other wood treatment products like it are made from Borate, a natural occuring element in the earth.  However, this product will not kill mold, only wood destroying organisms like termites or beetles, and fungus.  Mold on wood can be treated with a product called Boracare with Moldcare. You can apply this product yourself. It s very important to read and follow the product label.

13 of 15 people found this answer helpful.
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October 12, 2009 J.r. asked:

QHow often would I have to replenish the surface if I used Timbor on a log home?
The surface will be stained with a Behr siding product for sealing/staining purposes.


Timbor is more typically used on wood that will not be exposed to weathering and the outside.  You would need to re-apply the Timbor each time you re-sealed the wood with the Behr product.  The same company that makes Timbor makes a product called Bora-Care.  It is more expensive, but it is a liquid solution instead of a powder.  The Bora-Care will penetrate deeper in the wood, and protect the wood indefinitely so you would not have to re apply the product ever again.   Also, Bora-Care dries clear and is easier to paint or stain over whereas the Timbor leaves a white powder on the surface and is more difficult to paint or stain.  

9 of 10 people found this answer helpful.
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Most Recent Customer Questions

October 27, 2015 Carl from Orem, Ut asked:

QCan I put finishes over a reclaimed fir beam after I treat it with Timbor on the interior of a home?
I have several big reclaimed fir (I think) beams going up on the inside of a new home. Can I put something like a clear finish over them after treating with Timbor, after it has dried completely?


Yes, it is recommended that you use a finish and/or sealant after using Timbor. It will potentially dry with a texture so you may have to sand it first.

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August 22, 2015 Peter from Alpharetta, Georgia asked:

QCan I mix a small amount of Timbor for injecting into holes with an injector needle?
I would like to mix a small amount for hole injection. I have a log home and have been trying to treat the holes, but I would like to mix small amounts for injection with a small injection type needle.


Timbor should only be mixed and applied according to the product label. Because of the formulation, the Timbor solution would most likely clog any type of small applicator you would try to use. Jecta is a ready-to-use borate wood treatment that can be applied to specific areas.

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August 18, 2015 James from Virginia Beach Va asked:

QCan Timbor be airialized as a mist or fogger?
I have had my foundation crawl space Joyce treated in the past to re-mediate mold. The contractor sprays it as a wet solution over everything Joyce insulation piling etc. Then the insulation is wet which causes it to fall Daaaaa really.


Timbor is a wettable powder and as such is not labeled to be fogged. Timbor will clog all foggers because it never truly goes into a solution but instead just goes into a suspension. Please take a few minutes to read the Timbor product label so you can see all of the ways it is labeled to be applied. Please provide additional information on the targeted insect so that we can assist you further. We are always happy to help!

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August 10, 2015 Charlotte from Proctor, Wv asked:

QWill Tim-bor stain or discolor vinyl windows or hand rails?
Should they be taped off and covered?


Timbor may leave behind a white residue.  If you think it may come into contact with the windows or hand rails while you are applying it, it would be best to cover them just to be safe. 

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August 5, 2015 Charlotte from Proctor, Wv asked:

QWhat is the approximate drying time for Tim-bor?


The dry time for Timbor honestly is dependent on the ability of the wood to aborb the product and how heavy you treat. It could be a few hours before the surface of the wood is dry or even a day. 

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April 7, 2015 Carol from Tangent, Oregon asked:

QHow environmentally safe is Timbor?

A Timbor is made from the element Borate, which is a natural occuring element in the earth.  It is very safe and non-toxic when used as directed.

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April 2, 2015 Lorraine from Ben Lomond Ca asked:

QWhere in the Santa Cruz .CA Area can we buy Timbor?

A Timbor is a professional grade product so it will likely not be sold in a store. We do offer free and expedited shipping to ensure that you receive your package in a timely manner. We do not charge sales tax when the items are shipped to CA.

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March 9, 2015 Kevin from Toronto asked:

QCan I mix Timbor with a glycol solution instead of water for deeper wood penetration?

A No, Timbor cannot be mixed with anything else besides water. If you do mix it with other products, it will clump and not work the way you would like it to.

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March 9, 2015 Kevin from Toronto asked:

QI have some old stain on the wood I'd like to protect. Why can I not use Timbor right over the old stain?

A Timbor is a wood preservative that need to able to penetrate and be absorbed into the wood. If there is a stain, pain, or any type of sealant then the Timbor will not be able to penetrate thus making it ineffective. Any finish that has been applied to wood should be sanded off so that you can apply the Timbor for it to be effective. However, if you are wishing to restain the wood then BoraCare would be a better product because BoraCare dries completely clear whereas Timbor leaves a powdery white film.

1 of 2 people found this answer helpful.
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February 16, 2015 Charlie from North Stonington, Ct asked:

QWhat is the different between BoraCare and Timbor? Both seem to be disodium octaborate tetrahydrate
Trying to kill powderpost beetles.


Bora-Care and Timbor are both borate products used to treat wood, but they could not be more different.  Timbor is in a powder form that is mixed with water.  It is much less expensive but it is intended more for protecting new wood only, or wood that you know does not have any issues.  Timbor will only penetrate the outer layer of the wood (about 1/4 inch) so it is more for protection or for treating fungus on the surface of the wood.

If you have an active infestation of termites, powder-post beetles or wood borers deep inside the wood then Timbor would not make it through the wood to kill these insects, up to 4 inches with one application or 8 with 2 appliations.  BoraCare is a liquid borate but has an additive, a glycol solution, which allows the product to penetrate through the entire piece of wood, therefore it should be used any time you have an active infestation because you are guaranteed it will kill anything in the wood no matter how deep it is.  Also, BoraCare will last forever in the wood so you will never have to worry about any infestations in the wood that you treat ever again.

5 of 6 people found this answer helpful.
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