The study presents the hydrophobic effect of silane-modified protective systems on wood resistance to aging factors (water and UV radiation). This paper is focusedon conventional and low VOC emulsion systems for exterior use, which wereimproved with silanes such as methyltrimethoxysilane (MTMOS), aminoethylaminopropyltrimethoxysilane (AEAPTMOS) and glycidoxypropyltrimethoxysilane(GPTMOS). The performance of the new protective systems, applied on pine wood by surface impregnation, was demonstrated through an accelerated weathering test and evaluated by contact angle, colour and gloss changes. The study showed improvement in the hydrophobicity and photostability of the protective systems modified with selected silanes. The highest protection from the accelerated weathering conditions was obtained using the treatment with a solvent-borne formulation with 5% AEAPTMOS and an alkyd emulsion with 5% MTMOS.
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