%K Adhesives; Environmental technology; Fillers; Geopolymers; Inorganic polymers; Morphology; Paint; Pore size; Pore structure, Adhesive properties; Adhesive strength; Alkyd coatings; Alkyd paints; Environmental conditions; Geopolymer; Microstructures properties; Optimisations; Pull-off tests; Rice-husk ash, Adhesion, Adhesives; Anatomy; Bonding Strength; Fillers; Paint; Pore Size %X Ensuring strong adhesion, especially under varying environmental conditions, is a significant challenge in the field of coating technology. This research aims to enhance alkyd paint adhesive strength by incorporating rice husk ash-based geopolymer (GP-RHA) as a filler. Response Surface Methodology (RSM) technique was employed to systematically study the impact of GP-RHA levels on the adhesive strength of alkyd coatings under dry and wet conditions. The morphology of the coatings was analyzed using SEM-EDX. In dry pull-off test, the incorporation of GP-RHA in alkyd coatings led to an improvement in adhesive strength with the highest recorded adhesive strength of 3.9 MPa at a ratio of 41.67 wt. GP-RHA and 58.33 wt. alkyd paint. However, this higher proportion of GP-RHA resulted in the formation of a larger pore sizes hybrid coating, further causing water infiltration into the coating�s pore structure in wet pull-off test. Outcomes of this research showed the promising potential of GP-RHA filler in alkyd paint formulations to enhance adhesion. These findings offer valuable insights into the development of coatings utilizing agro-waste as a filler to improve its adhesive properties. © 2024 The Author(s). Published with license by Taylor & Francis Group, LLC. %D 2024 %N 1 %R 10.1080/15440478.2024.2317427 %O cited By 0 %J Journal of Natural Fibers %L scholars20174 %T Study on Adhesive and Microstructure Properties of Rice Husk Ash-Based Geopolymer Hybrid Alkyd Coating %A M.N. Abdullah %A F. Mustapha %A M. Mustapha %A T. Khan %A T.A. Sebaey %V 21