Phenolic gum or phenol formaldehyde (PF) tar containing distinctive level of zinc oxide (ZnO) nanoparticles was arranged and used to treat rubberwood. Three sorts of treatment arrangements were readied, in particular (1) low atomic weight phenol formaldehyde gum (LMwPF), (2) 1,5 wt % nano ZnO broke up in water (ZnO/H2O), and (3) blend of both LMwPF and 1,5 wt % nano ZnO (LMwPF/ZnO). The rubberwood tests were lowered into the treatment answers for 60, 90, and 120 min, before vacuum impregnation. The untreated rubberwood tests filled in as the controlled examples. The warm solidness conduct and opposition against white-decay parasites (Pycnoporus sanguineus) of the treated rubberwood tests were assessed. The outcomes uncover that the treated rubberwood had somewhat better warm steadiness contrasted with the untreated examples. As far as rot opposition, the rubberwood treated with LMwPF and LMwPF/ZnO have high obstruction against white-decay growths. Then again, the rubberwood treated with ZnO/H2O didn't accomplish comparable viability as the other two medicines, aside from the examples that were lowered in ZnO/H2O for 120 min. The outcomes demonstrate that 1,5 wt % nano ZnO could be adequate in giving better solidness than rubberwood given that more drawn out submersion time is embraced. 
