Adhesion, biological properties of Iraqi coatings were developed by using ZnO (Zinc oxide) and TiO₂ (Titanium dioxide) NPs (nanoparticles) with PVA (polyvinyl alcohol). Iraqi dyes produced in the Modern Paints Company such as (gray food epoxy, for the inside drinking water tanks epoxy, lead food epoxy and transparent food epoxy primer) suffer from poor adhesion on a gypsum (Bork) piece, peeling ability, and low biological activity as a function of time. Experimental results of the coated gypsum (Bork) piece with these un-developed coating shows low adhesion force for all samples arrange from (11 N/m² for hospital dye to 134 N/m² for food grade transparent epoxy primer), while the developed coating have values range from (95 N/m² for gray food epoxy to value of 160 N/m² for white hospital epoxy). Furthermore, the adhesion force after time-acceleration weathering show also high adhesion force for developed coating as compared with original coating where the values range for undeveloped coating were (42 N/m² for white hospital epoxy and 113 N/m² for hospital dye) while the developed coating range were (52 N/m² for food grade transparent epoxy primer to 142 N/ m² for hospital). The Biological efficiency as anti-parasitic against (Escherichia coli and Staphylococcus aureus) for the sample oil food dye shows non biological efficiency before additive, while this sample shows a biological efficiency after additive and after acceleration time by using time-acceleration weathering test over a period of more than six months. As a result, the additive of ZnO and TiO² /PVA nanocomposite show the development of some Iraqi coating by the increment in adhesion force for the samples directly and after six months also show a biological efficiency for oil food dye.

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