<p>The diffusion of specific chain segments, end groups, and incorporated nanofillers across bulk/surface interfaces of coatings contributes to fouling-resistant and even corrosion-inhibition performances. This largely depends on their sizes, the degree of cross-linking within the polymer chains, and how they were chemically grafted. In the present study, an amphiphilic oligomer is first synthesized from by telomerization, before preparing a hybrid polymer blend with a new organosilicon synthesized via the hydrosilylation reaction. This new cross-linked organosilicon/telomer blend with amphiphilic segments, reinforced CaO/SiO₂NPs (SEB1-4), provides improved fouling- and corrosion-resistant performances for low-carbon steel in seawater. Corrosion protection by this polymer coating depends on the blend ratio between the organosilicon gel (OSG) and amphiphilic telomer (AT) precursors. The order of increased corrosion protection is SEB1 (1:1) &gt; SEB2 (1:2) &gt; SEB3 (2:1) &gt; SEB4 (3:1). Compared with an unreinforced coating (i.e., no nanofillers), this reinforced polymer exhibited enhanced antibacterial activity when coated on steel, eliminating the chance of biofilm buildup and surface adherence for a marine bacterium, <i>Pseudomonas aeruginosa</i>. Integrating these nanofillers promoted improved coating adhesion, mechanical strength, and surface protection, while unreinforced coatings exhibited severe disbonding and adhesive/cohesive failures.</p><p></p>