Post Guard

Why choose the Genics Post Guard?
(Also known as Cobra TM ROD)

Boron has long been recognized as an effective wood preservative, protecting wood from decay and insects. Traditional fused borate rods were formed from 100% disodium octaborate tetrahydrate and worked very well. Genics has taken this same disodium octaborate tetrahydrate and enhanced it by blending it with copper hydroxide to form what is referred to as a co-biocide. While effective separately, boron and copper work even better when used together.


Boron is very mobile in water while copper is not. Genics has combined these two opposing characteristics into a mobile AND long lasting wood preservative. The boron pulls the copper along while the copper slows down the boron. Tests have shown that, even in very wet conditions the Post Guard remains effective for many years.

Greater Efficacy

Copper and boron have great synergy when used together. The old saying “The whole is greater than the sum of it’s parts” is a good description for the Post Guard treatment system.

Broader Decay Protection

Not all forms of wood decay fungi are controlled by boron. These boron resistant fungi however, are controlled by copper. This gives a broader spectrum of decay prevention.

Commitment to Quality

Genics has maintained a high quality product by refusing to use cheaper, less pure ingredients in our Post Guard rods. Make sure that your boron rods contain disodium octaborate tetrahydrate (DOT) and not a less effective substitute.


The Post Guard rods are made to fit inside a 1/2” hole. Simply drill the treatment hole, ensuring a cross grain alignment and slide the rod in. Then seal the hole with a reusable CobraTM PLUG, caulking or wood dowel. Once installed, the moisture in the wood will activate and carry the copper-borate creating a defense against wood decay. This same hole can be used again in the future to add additional treatments

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