impingement, [ 11 ] tape-peeling, [ 11b ] waterimpact tests, [ 12 ] supersonic treatments, [ 12a ] or slight friction (a few centimeters or dozens of centimeters of abrasion with sandpaper). [ 13 ] Moreover, a host of current procedures either require complex processing and specialized equipment or are diffi cult to realize industrial-scale applications. [ 8b , 14 ] Clearly, the creation of a simple, low-cost superhydrophobic surface with excellent mechanical durability and practical utility for large-scale applications is urgently required. Recently, Lu et al. have developed a method to bond the self-cleaning coatings to the substrates by using adhesives; the resulting surfaces maintained their hydrophobicity after various types of destructive tests, including fi nger-wipe, knife-scratch, and 40 abrasion cycles with sandpaper tests. [ 15 ] However, such a two-layer system is unfavorable for paint construction.In the present work, we developed a polymer-based superhydrophobic composite coating by combining a methyl silicone resin with a superhydrophobic silica sol. To fabricate the superhydrophobic silica sol, we selected γ-aminopropyltriethoxysilane (APTES) and 1H,1H,2H,2H-perfl uorooctyltriethoxysilane (PFOTS) as the agglomeration agent and hydrophobic agent, respectively, with which to modify silica nanoparticles; the average diameter of this silica nanoparticles was about approximately 3-5 nm, which are smaller than other superhydrophobic nanoparticles reported in the literature to date. [ 15,16 ] We subsequently added a commercial methyl silicone resin to the superhydrophobic sol to enhance its mechanical durability. The coating exhibits remarkable superhydrophobicity even after being subjected to a fi nger-wipe test, a knife-scratch test, or 50 abrasion cycles with sandpaper. The coating exhibits high rigidity (pencil hardness of 9H), good fl exibility (impact resistance of 1 m kg) and great adhesion (5B).The superhydrophobic surface is attributed to a combination of topographical microstructures and chemical compositions. [ 17 ] When a drop of water (5 µL) was placed on the composite coating substrate, a perfect spherical water droplet formed with a CA of 166° and a SA of 1° ( Figure 1 a). The CAs were 137° and 129° for diiodomethane and edible oil, respectively, showing the coating's good oleophobicity. And the apparent surface free energy is 1.14 mJ·m −2 according to the Owens-Wendt method. The surface topography of the composite coating was examined by scanning electron microscopy (SEM). Numerous aggregated silica nanoparticles and micropores were observed to be distributed on the coated substrate (Figure 1 b). These particles and micropores can trap a large fraction of air, which is essential for The practical applications of superhydrophobic self-cleaning surfaces have been hampered by poor mechanical durability. Here, a composite coating that possesses excellent superhydrophobicity and robust mechanical durability is fabricated, consisting of a methyl silicone resin and a superhydrophobic sil...