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🛡️ Defend your wood like a pro — because your space deserves the best!
Nisus Tim-BOR Professional is a 25 lb water-soluble borate powder that offers versatile application as dust, liquid, or foam to protect wood from termites, carpenter ants, and decay fungi. Safe for bare wood and construction materials, it’s ideal for new construction and eco-friendly wood preservation, delivering long-lasting, stain-free protection trusted by professionals.








| ASIN | B004G6UHES |
| Best Sellers Rank | #6,305 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #49 in Insect & Pest Repellent Spray Concentrates |
| Brand | Nisus |
| Brand Name | Nisus |
| Customer Reviews | 4.6 out of 5 stars 1,479 Reviews |
| Included Components | 1 Bag |
| Item Form | Powder |
| Item Weight | 27 Pounds |
| Liquid Volume | 1.5 Liters |
| Manufacturer | Nisus |
| Model Number | 657859 |
| Part Number | Tim-Bor Insecticidal Dust |
| Target Species | Fungus |
| UPC | 616609111513 |
| Unit Count | 400.0 Ounce |
A**S
Protects as promised.
This is the second purchase of Timbor for me. It treats and protects as promised. Last purchase was for an outdoor table and it is still big and fungus free tears after treatment. This is going to be used on rafters and beams in a shed. Great value. Great product. Will purchase again when the need arises. Follow the directions and you cannot go wrong. Low odor and no noticable smell after applying.
B**S
Stop the wood eating insects and rot !
Good package and good price.
J**R
Seems good
Used this on the studs when my wall was open for work. Hope it lasts.
E**S
easy to use, good termite treatment
We were doing some termite repairs on our wood deck, and I wanted to treat the wood for termites so we wouldn't have to do it again. This is what the termite pros often use to treat the wood in your house to keep the termites away. 1 package mixes with 1 gallon of water, and you apply it with a garden sprayer. Wear a mask; you don't want to be breathing the stuff. But you'll breathe a litle easier knowing you're less likely to get termites, and you spent a tiny fraction of what the termite company would charge.
J**F
Be careful with insecticides
Great item and price, well packed. Arrived as scheduled. Haven't used it yet. Will review after three months
Y**A
Effective in killing termites if used properly
great and effective termite killer.
R**D
Works, but not user friendly
Make sure to read instructions carefully. The mix has to be perfect for it to work.
A**A
Time will tell.
I bought two bags which was more than enough to cover the back of my 56’ home, bare wood siding recently installed. We boiled one gallon of water and then instantly mixed the powder in and had no issue dissolving like other reviews have stated. On the first pass, we followed instructions with 1 gallon water to one bag of powder for the 15% solution. One the second pass, we did as another poster suggested and mixed with half gallon of antifreeze, half gallon boiling water, one bag of powder. It instantly absorbed into to wood so much faster than the first coating. Ease of use and price of product is a win for me! Only time will tell how well this product works, but I’m hoping that I have as much success battling off termites as others have had! When I bought my home, it passed inspection for termites. In less than a year we started to find termite damage throughout the house. I used termidor foam in the house, taurus in trenches around the slab, and within 6 months found new termite damage in my shop out back, but none in the house or around the front of shop that was also treated. We redid the entire house and all buildings with the trenching and Taurus treatment and have seen no new termite damage since. Hurricane Harvey damaged siding to the home and I haven’t been able to repair this. We had an energy company test the home and found that there was tons of air leakage where the missing siding was. This was putting a strain on my AC and raising my utility bill to an astronomical size! I had enough Bead Plywood to use as siding but have been reluctant due to previous termite issues. This product, my research into it, and all of the positive reviews gave me hope. If I can use what I have, treat it with this stuff, and replace the siding and it work for a few years until I can have the entire home re-sides, then I’ll be through the roof with excitement! Only time will tell.
Trustpilot
1 week ago
1 week ago