Curry stains on clothes and dishes in daily life inspired us to investigate the potential use of turmeric powder, the major ingredient in curry, as a universal-coating material. After condition optimization, the coating solution was made by boiling and filtering a turmeric slurry, and the coating was formed at pH 3, leading to the formation-of ultrathin, transparent films. Various inorganic and polymeric substrates were successfully coated with turmeric-based materials, including gold, TiO2, SiO2, glass, stainless steel, indium tin oxide, nylon, polyethylene, polycarbonate, polypropylene, acryl, and poly (ethylene terephthalate). The turmeric-based coating was also applied to poly(tetrafluoroethylene) (PTFE, Teflon) and cyclic olefin copolymer (COC), and after double clip-coating-, the water contact angle was changed from 118.2 degrees to 49.1 degrees for PTFE and from 91.2 degrees to 44.7 degrees for COC. The water contact angles for the other substrates converged to 35 after coating, confirming the substrate-independent universal coating capability of turmeric. The X-ray photoelectron spectroscopic analysis indicated the presence of nitrogen in the film, and the possible involvement of amines in film formation was investigated with several amine compounds.