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Board Defense
Board Defense

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We are always expanding our distribution; however, if we don't have a dealer in your area, please call us at 1-800-333-5514.

BoardDefense Product Literature PDFs:

Board Defense

Board Defense is an insecticide, termiticide and fungicide concentrate for the control of wood destroying insects and rot. It is a very versatile product for the protection and treatment of wood against all wood destroying organisms. Board Defense is a water-soluble white powder. It can be used dry or in solution to form an effective penetrating solution. There are no hazardous solvents and no odors. The active ingredient in Board Defense, Disodium Octaborate Tetrahydrate, is a borate derivative that will not break down over time. Borates have been used as a safe and effective pest control for over 40 years. In the USA, Board Defense in part of the System Three EndRot System for wood rot repair. For more details about the EndRot System, read our Wood Restoration page.


Board Defense is applied as a dust or solution (mixed with water) for treatment of wood against wood destroying organisms and for general insect and fungus control. When applied as a solution, Board Defense will use the moisture present in wood to penetrate deep into the board. Since Board Defense does not break down, the active ingredient will be drawn deeper into the wood over time. This provides long lasting and effective protection.

Borate Powder, 2 oz. pkg mixed with water, makes 1 pint of liquid solution.
Borate Powder, 1 lb. pkg mixed with water, makes 1 gallon of liquid solution. 

Rot Repair Project

See our Rot Repair Project page for all the information you'll need for Rot Repair, including step-by-step video instruction.

Available colors:

  • White powder


For health and safety information concerning this product, please refer to the Material Safety Data Sheet (MSDS) for this product. Click here for the MSDS section of our website

Board Defense is a registered pesticide in the USA, but not in Canada. It cannot be shipped to Canada.

Board Defense

Recommended Uses:

Board Defense is effective against decay, fungi, termites, beetles, carpenter ants, cockroaches, ants, silverfish and crickets. Board Defense is a slow acting stomach poison to insects and an instant contact poison to wood rot and fungi. As wood destroying insects and their larvae carry on their normal activities, they accumulate Board Defense in their systems. A buildup of Board Defense eventually poisons the insect. Board Defense is used as the first step in System Three Resins' EndRot System for wood rot repair to make sure that the wood destroying organisms are destroyed before it is repaired and patched.

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