To improve the corrosion resistance and glossiness offlaky aluminum pigments in waterborne coatings, aflaky aluminum pigment was encapsulated with poly(methylhydrosiloxane) (PMHS) as an anti-corrosionfilm by in-situ polymerization, and its chemical composition was characterized by Fourier-transforminfrared and X-ray photoelectron spectroscopy, and its morphology and microstructure was identified byscanning and transmission electron microcopy. Furthermore, its anticorrosive performance wasconfirmed by Zeta potential measurement and electrochemical impedance spectroscopy. Theencapsulatedflaky aluminum pigment not only exhibits excellent corrosion resistance but also showsan improved thermal stability due to the fabrication of a PMHS-based organosiliconfilm on the surface ofaluminumflakes. Most of all, the original glossiness and brightness could be maintained for thewaterborne coatingfilm after the encapsulatedflaky aluminum pigment was incorporated, indicating agreat application potential in waterborne coatings, water-based paints, printing inks, spray-freematerials and any more. This work provides a new strategy for design and fabrication of high corrosionresistantand high glossy aluminum pigments.