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4.5 out of 5 stars Rating: 4.6

65 Reviews | 62 Q&A


{ $14.70 { $9.70 $64.80 $89.00 $84.30
  Size/Description Price/Ea. Qty
Timbor bag (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 (25 lb. each)

Buy 1: $89.00 each

Buy 2 or more: $84.30 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.

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   50
4 stars   10
3 stars   2
2 stars   2
1 star   1

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Average Customer Rating
4.5 out of 5 stars (65)

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Most Helpful Customer Reviews
  • 28 of 28 people found this review helpful:

    5 of 5 stars  Timbor DIY vs Commercial
    By Jeff in South Florida on 05/28/2011

    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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  • 26 of 30 people found this review helpful:

    5 of 5 stars  Good Stuf
    By Tim in San Diego, CA on 10/18/2010

    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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  • 23 of 28 people found this review helpful:

    4 of 5 stars  Small quantities not available
    By Laura in Moses Lake, wa on 04/23/2010
    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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  • 21 of 21 people found this review helpful:

    5 of 5 stars  Timbor
    By Russ in Lawrence, KS on 03/14/2011

    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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  • 15 of 15 people found this review helpful:

    5 of 5 stars  Timbor
    By Cathy in Annapolis, MD on 06/15/2010
    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
  • 5 of 5 stars  Awesome Timbor
    By Bj in Newport Beach, CA on 03/14/2017

    Quick service -exactly what I ordered!!!

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Quick free shipping
    By Topher in TAMPA, FL on 01/03/2017

    Ordered this for a low price and was shocked it came with free shipping. Arrived quickly too!

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Timbor to the rescue!
    By Faye in Salisbury, nc on 10/07/2016

    Killed the nasty worm bores....easy to use...did a good job!

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  • 5 of 5 stars  Timbor
    By Tom in Falls Church VA on 09/08/2016

    This product is one of the very best for wood related problems and wood destroying insects. Not sure why builders do not treat all wood that is subject to termite-ants etc with this product prior to construction.

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  • 2 of 2 people found this review helpful:

    5 of 5 stars  Timbor works great!
    By Judi in Bluffton, SC on 08/19/2016

    This is the third year I've ordered Timbor. A few years ago, our 100 plus year old barn up north showed evidence of powder post beetle activity in the beams. After a solid treatment of Timbor my husband sprayed on all f the beams, the activity was much reduced. He has been re appliying it in the fall every year and it has made a huge difference. It has also gotten rid of any wood bees and carpenter ants. There is no smelly residue and it mixes well with water to put in the sprayer. We have black rubber floors in the barn so if the beetles were still chewing away, we would easily spot sawdust on the black floor.

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Timbor powder
    By Greg in timber lake, sd on 07/12/2016

    Product mixes well, but read the directions about no carry over in sprayer, important. Make sure wood is pre-wetted for better penetration and step back and know you are prepared for boring insects and mildew or fungus. Product works well and is easily applied by the average person. DoMyOwnPestControl.com is great about shipping, price and advise.

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  • 5 of 5 stars  timbor
    By Ray in milton,fl. on 06/22/2016

    mixes and applies easily. there is a measuring cup included in the 25lb. pail that makes measuring a no-brainer. it was applied with a pump sprayer and all went well. have used this before on a log home and it appears to work well. clean up is a snap...

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  • 5 of 5 stars  timbor for picnic table
    By Sarah in nh on 06/13/2016

    Great shipping time. Product goes on just like directions say. I am happy so far. If the picnic table lasts a long time it'll be all that its cracked up to be! Thanks

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  • 1 of 1 people found this review helpful:

    5 of 5 stars  Timbor
    By Robert in FESTUS, MISSOURI on 06/06/2016

    Timbor was exactly what I needed to control a Powder Post Beetle infestation... DMOPC Service was excellent... I placed my order & 2 days later my order was delivered to my home. The product price was very reasonable too. Thanks you for expediting my order!!!

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  • 4 of 5 stars  went on as planned
    By Avery in Tampa, fl on 06/03/2016

    everything went as advertised and application went as expected. Time will tell if product performs as advertised. One thing....package was damaged and some of the product got out. Looks like shipper tried to jury rig package with wrapping tape. Just a minor item that had no impact on application process. Will order some more to complete task in crawlspace.

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Most Helpful Q&A's

09/16/2009 Aj

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.

54 of 55 people found this answer helpful.
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09/13/2010 Carol

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.

33 of 34 people found this answer helpful.
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12/14/2009 Mike

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.

28 of 28 people found this answer helpful.
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02/16/2015 Charlie from North Stonington, Ct

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.

27 of 29 people found this answer helpful.
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10/12/2009 J.r.

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.  

20 of 21 people found this answer helpful.
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Most Recent Customer Questions

10/13/2016 Walt from Watsonville, Ca

QCan you dip stud or beams using Timbor?
Can new wood studs or beams be effectively treated by dipping in a tank filled with a Tim-bor solution frequently stirred so it remains in suspension? Could full immersion like this be more effective than spraying? It may also be quicker and more economical, with no overspray. Also, are oil-based or water-based sealers or paints better for sealing the dry treated wood and extending the life of the Tim-bor treatment, i.e., which type is preferred? Should any surface powder be brushed off for better adhesion before painting or sealed in?


Yes you can use the dip method when using Timbor†however, you will still be getting the same 15% solution rate as you would if you were spraying it on and getting the same 1/16" penetration level as well. To get the full penetration all the way through the wood we recommend using Boracare. Yes, you would want to get the surface powder left behind by the Timbor off the wood before using any finishing products.

1 of 1 people found this answer helpful.
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10/10/2016 Heath from Tampa, Fl

QCan I use Timbor to treat powderpost beetles on leaves on a tiki hut?
I have a tiki hut that has palm leaves for the roof. The stems of the leaves are infected with powderpost beetles. Which is the best product to treat this issue?


We would not recommend using a borate product such as Timbor or Boracare on the leaves since the product could potentially damage the leaves. These products are designed to be used on sturdier cellulosic materials such as wooden beams and slats. If you are not able to replace the infested branches, then you would likely need to have a professional company fumigate the structure.

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07/05/2016 Cheryl from Garden Grove

QAfter the application of Timbor on the interior of building, does it need to be painted?


It is recommended that you use a sealant or paint on the wood treated with Timbor. This will seal the product into the wood so that it will last for the life of the wood.†It is not necessary to paint or use a sealant though.†

0 of 1 people found this answer helpful.
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03/10/2016 Errol from Tucker, Ga

QDoes Timbor kill vegetation and weeds?


Timbor is an insecticide so it should have no effect on vegetation or weeds. You may want to check out the Herbicides & Weed Killers section of our website.†

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02/18/2016 Steve from Castro Valley, Ca

QIs Timbor harmful to wildlife?
I seen in an earlier answer a professional staff member stated that "Timbor is not harmful to pets or wildlife" when it clearly states on the bucket/label that "This pesticide is toxic to fish and wildlife" Why is there conflicting answers?


Timbor is safe around wildlife and/or pets when it is used as directed. While you are doing a treatment, it is recommended that pets/wildlife out of the area until the product has dried completely. It should also not be used directly in sitting water. Timbor is used around structural wood so it should not come in contact with wildlife or pets.

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01/11/2016 David from Greencastle, In

QCan I treat raw lumber with Timbor to put on interior walls?
These walls will not be covered with anything.


Timbor can be applied to raw wood for the interior walls. Please refer to the product label for complete application instructions. If the wood will remain exposed as decorative structural wood, then you may want to use Boracare instead of Timbor; Timbor sometimes will†dry with a visibly white texture that may not be as appealing in living spaces. It is also much easier to apply stain, paint, or sealant after applying Boracare.

7 of 7 people found this answer helpful.
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12/31/2015 Rodney from Seaside, Or

QCan I use same applicator for Timbor and Termidor SC if I clean it well between uses?


You could potentially use the same sprayer to apply Timbor and Termidor SC if it were cleaned and allowed to dry completely between product uses. It is best to use a dedicated sprayer to apply non-repellent insecticides such as Termidor SC to avoid contaminating the insecticide. You could also use a tank cleaner such as Neutralize Spray Tank Cleaner and Neutralizer†to reduce the risk of contaminating products.

2 of 2 people found this answer helpful.
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12/18/2015 Glenn

QWhat type of respiratory or other protective equipment should be used when applying Tim-bor?
When applying Timbor under an open wood deck with good ventilation should a specific type of protective mask and clothing be used?


Timbor is actually odorless so you don't necessarily have to wear a protective mask but if you desire to do so anyway, we†would recommend using an N95 Valved Respiratory Mask.

2 of 2 people found this answer helpful.
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10/27/2015 Carl from Orem, Ut

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.

3 of 3 people found this answer helpful.
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08/22/2015 Peter from Alpharetta, Georgia

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.

2 of 2 people found this answer helpful.
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