Modifying of the surface of pine wood with aqueous solutions boron-nitrogen compounds was empirically found to provide a 100% biological stability of wood for at least 20 years. Durability of the protective effect of the modifiers developed is due to the formation of hydrolytically stable compounds on the surface of the wood.

Modification of wood surface with compositions produced on the base of boric acid esters of amin-alcohols increases its polarity, decreases specific surface area and reduces water absorption of wood twice. This improves wettability of water surface and increases adhesion strength of paint coating which is the result of intermolecular forces of interaction. The latter provides increases service life of paint coating.

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