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This work investigated the effects of coating thickness and titanium dioxide (TiO2) dosage in polyurethane (PU) coating on solar reflective index, adhesion and thermal conductivity for wood/natural rubber (WNR) composite sheet before and after a prolonged UV ageing condition.The TiO2 powder content to be added in the PU coating was varied from 0-15 parts per hundred (pph) of polyurethane.The PU coating thickness on WNR composite sheet was varied from 130 to 300 micrometers.