Borates (Boron Compounds)
Water-based, low-toxicity chemicals used for wood treatment.
Applied by brushing, spraying, or injecting into wood.
Penetrates deep into timber and prevents termite feeding.
Common for furniture, doors, windows, and wooden structures.
Creosote Oil
An old but effective chemical for timber preservation.
Applied on wood surfaces to make them termite-resistant.Mostly used in railway sleepers, poles, and outdoor wooden works.Less common today due to odor and health hazards.
Alkaline Copper Quaternary (ACQ)
A modern, eco-friendlier wood preservative.Copper acts as a fungicide, and quaternary ammonium protects against insects.Used in treated wood industries.Long-lasting and safer than traditional creosote or arsenic-based chemicals.